diff --git a/ofborg/src/acl.rs b/ofborg/src/acl.rs
index 5df12a7..69f77d0 100644
--- a/ofborg/src/acl.rs
+++ b/ofborg/src/acl.rs
@@ -1,3 +1,5 @@
+use ofborg::systems::System;
+
 pub struct ACL {
     trusted_users: Vec<String>,
     known_users: Vec<String>,
@@ -27,21 +29,29 @@ impl ACL {
         self.repos.contains(&name.to_lowercase())
     }
 
+    pub fn build_job_architectures_for_user_repo(&self, user: &str, repo: &str) -> Vec<System> {
+        if self.can_build_unrestricted(user, repo) {
+            vec![
+                System::X8664Darwin,
+                System::X8664Linux,
+                System::Aarch64Linux,
+            ]
+        } else if self.can_build_restricted(user, repo) {
+            vec![System::X8664Linux, System::Aarch64Linux]
+        } else {
+            vec![]
+        }
+    }
+
     pub fn build_job_destinations_for_user_repo(
         &self,
         user: &str,
         repo: &str,
     ) -> Vec<(Option<String>, Option<String>)> {
-        if self.can_build_unrestricted(user, repo) {
-            vec![(Some("build-jobs".to_owned()), None)]
-        } else if self.can_build_restricted(user, repo) {
-            vec![
-                (None, Some("build-inputs-x86_64-linux".to_owned())),
-                (None, Some("build-inputs-aarch64-linux".to_owned())),
-            ]
-        } else {
-            vec![]
-        }
+        self.build_job_architectures_for_user_repo(user, repo)
+            .iter()
+            .map(|system| system.as_build_destination())
+            .collect()
     }
 
     pub fn can_build_restricted(&self, user: &str, repo: &str) -> bool {
diff --git a/ofborg/src/lib.rs b/ofborg/src/lib.rs
index eae41fc..87ea893 100644
--- a/ofborg/src/lib.rs
+++ b/ofborg/src/lib.rs
@@ -45,6 +45,7 @@ pub mod nix;
 pub mod notifyworker;
 pub mod outpathdiff;
 pub mod stats;
+pub mod systems;
 pub mod tagger;
 pub mod tasks;
 pub mod test_scratch;
@@ -69,6 +70,7 @@ pub mod ofborg {
     pub use notifyworker;
     pub use outpathdiff;
     pub use stats;
+    pub use systems;
     pub use tagger;
     pub use tasks;
     pub use test_scratch;
diff --git a/ofborg/src/message/buildjob.rs b/ofborg/src/message/buildjob.rs
index 445ed12..88362a9 100644
--- a/ofborg/src/message/buildjob.rs
+++ b/ofborg/src/message/buildjob.rs
@@ -13,6 +13,12 @@ pub struct BuildJob {
     pub statusreport: Option<ExchangeQueue>, // (Exchange, Routing Key)
 }
 
+#[derive(Serialize, Deserialize, Debug)]
+pub struct QueuedBuildJobs {
+    pub job: BuildJob,
+    pub architectures: Vec<String>,
+}
+
 pub type ExchangeQueue = (Option<Exchange>, Option<RoutingKey>);
 type Exchange = String;
 type RoutingKey = String;
diff --git a/ofborg/src/message/buildresult.rs b/ofborg/src/message/buildresult.rs
index f7b7133..5a41ac6 100644
--- a/ofborg/src/message/buildresult.rs
+++ b/ofborg/src/message/buildresult.rs
@@ -1,3 +1,4 @@
+use hubcaps::checks::Conclusion;
 use ofborg::message::{Pr, Repo};
 
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
@@ -9,6 +10,30 @@ pub enum BuildStatus {
     UnexpectedError { err: String },
 }
 
+impl From<BuildStatus> for String {
+    fn from(status: BuildStatus) -> String {
+        match status {
+            BuildStatus::Skipped => "No attempt".into(),
+            BuildStatus::Success => "Success".into(),
+            BuildStatus::Failure => "Failure".into(),
+            BuildStatus::TimedOut => "Timed out, unknown build status".into(),
+            BuildStatus::UnexpectedError { ref err } => format!("Unexpected error: {}", err),
+        }
+    }
+}
+
+impl From<BuildStatus> for Conclusion {
+    fn from(status: BuildStatus) -> Conclusion {
+        match status {
+            BuildStatus::Skipped => Conclusion::Neutral,
+            BuildStatus::Success => Conclusion::Success,
+            BuildStatus::Failure => Conclusion::Neutral,
+            BuildStatus::TimedOut => Conclusion::Neutral,
+            BuildStatus::UnexpectedError { .. } => Conclusion::Neutral,
+        }
+    }
+}
+
 pub struct LegacyBuildResult {
     pub repo: Repo,
     pub pr: Pr,
diff --git a/ofborg/src/systems.rs b/ofborg/src/systems.rs
new file mode 100644
index 0000000..c6e2425
--- /dev/null
+++ b/ofborg/src/systems.rs
@@ -0,0 +1,20 @@
+#[derive(Clone, Debug)]
+pub enum System {
+    X8664Linux,
+    Aarch64Linux,
+    X8664Darwin,
+}
+
+impl System {
+    pub fn to_string(&self) -> String {
+        match self {
+            System::X8664Linux => String::from("x86_64-linux"),
+            System::Aarch64Linux => String::from("aarch64-linux"),
+            System::X8664Darwin => String::from("x86_64-darwin"),
+        }
+    }
+
+    pub fn as_build_destination(&self) -> (Option<String>, Option<String>) {
+        (None, Some(format!("build-inputs-{}", self.to_string())))
+    }
+}
diff --git a/ofborg/src/tasks/githubcommentfilter.rs b/ofborg/src/tasks/githubcommentfilter.rs
index b33034f..9214ac3 100644
--- a/ofborg/src/tasks/githubcommentfilter.rs
+++ b/ofborg/src/tasks/githubcommentfilter.rs
@@ -55,7 +55,7 @@ impl worker::SimpleWorker for GitHubCommentWorker {
             return vec![worker::Action::Ack];
         }
 
-        let build_destinations = self.acl.build_job_destinations_for_user_repo(
+        let build_destinations = self.acl.build_job_architectures_for_user_repo(
             &job.comment.user.login,
             &job.repository.full_name,
         );
@@ -119,9 +119,23 @@ impl worker::SimpleWorker for GitHubCommentWorker {
                             format!("{}", Uuid::new_v4()),
                         );
 
-                        for (exch, rk) in build_destinations.clone() {
-                            response.push(worker::publish_serde_action(exch, rk, &msg));
+                        for arch in build_destinations.iter() {
+                            let (exchange, routingkey) = arch.as_build_destination();
+                            response.push(worker::publish_serde_action(exchange, routingkey, &msg));
                         }
+
+                        response.push(worker::publish_serde_action(
+                            Some("build-results".to_string()),
+                            None,
+                            &buildjob::QueuedBuildJobs {
+                                job: msg,
+                                architectures: build_destinations
+                                    .iter()
+                                    .cloned()
+                                    .map(|arch| arch.to_string())
+                                    .collect(),
+                            },
+                        ));
                     }
                     commentparser::Instruction::Eval => {
                         let msg = massrebuildjob::MassRebuildJob {
diff --git a/ofborg/src/tasks/githubcommentposter.rs b/ofborg/src/tasks/githubcommentposter.rs
index 61f34af..9cae3ed 100644
--- a/ofborg/src/tasks/githubcommentposter.rs
+++ b/ofborg/src/tasks/githubcommentposter.rs
@@ -7,7 +7,9 @@ use amqp::protocol::basic::{BasicProperties, Deliver};
 use chrono::{DateTime, Utc};
 use hubcaps;
 use hubcaps::checks::{CheckRunOptions, CheckRunState, Conclusion, Output};
+use message::buildjob::{BuildJob, QueuedBuildJobs};
 use ofborg::message::buildresult::{BuildResult, BuildStatus, LegacyBuildResult};
+use ofborg::message::Repo;
 use ofborg::worker;
 
 pub struct GitHubCommentPoster {
@@ -20,8 +22,29 @@ impl GitHubCommentPoster {
     }
 }
 
+pub enum PostableEvent {
+    BuildQueued(QueuedBuildJobs),
+    BuildFinished(BuildResult),
+}
+
+impl PostableEvent {
+    fn from(bytes: &[u8]) -> Result<PostableEvent, String> {
+        match serde_json::from_slice::<QueuedBuildJobs>(bytes) {
+            Ok(e) => Ok(PostableEvent::BuildQueued(e)),
+            Err(_) => match serde_json::from_slice::<BuildResult>(bytes) {
+                Ok(e) => Ok(PostableEvent::BuildFinished(e)),
+                Err(e) => Err(format!(
+                    "Failed to deserialize PostableEvent: {:?}, err: {:}",
+                    String::from_utf8_lossy(&bytes.to_vec()),
+                    e
+                )),
+            },
+        }
+    }
+}
+
 impl worker::SimpleWorker for GitHubCommentPoster {
-    type J = BuildResult;
+    type J = PostableEvent;
 
     fn msg_to_job(
         &mut self,
@@ -29,46 +52,79 @@ impl worker::SimpleWorker for GitHubCommentPoster {
         _: &BasicProperties,
         body: &[u8],
     ) -> Result<Self::J, String> {
-        match serde_json::from_slice(body) {
-            Ok(e) => Ok(e),
-            Err(e) => Err(format!(
-                "Failed to deserialize BuildResult: {:?}, err: {:}",
-                String::from_utf8_lossy(&body.to_vec()),
-                e
-            )),
-        }
+        PostableEvent::from(body)
     }
 
-    fn consumer(&mut self, job: &BuildResult) -> worker::Actions {
-        let result = job.legacy();
-        let comment = hubcaps::comments::CommentOptions {
-            body: result_to_comment(&result),
-        };
-        let check = result_to_check(&result, Utc::now());
-        println!(":{:?}", check);
-        println!(":{:?}", comment);
+    fn consumer(&mut self, job: &PostableEvent) -> worker::Actions {
+        let mut checks: Vec<CheckRunOptions> = vec![];
+        let repo: Repo;
 
-        let check_create_attempt = self
-            .github
-            .repo(result.repo.owner.clone(), result.repo.name.clone())
-            .checkruns()
-            .create(&check);
+        match job {
+            PostableEvent::BuildQueued(queued_job) => {
+                repo = queued_job.job.repo.clone();
+                for architecture in queued_job.architectures.iter() {
+                    checks.push(job_to_check(&queued_job.job, &architecture, Utc::now()));
+                }
+            }
+            PostableEvent::BuildFinished(finished_job) => {
+                let result = finished_job.legacy();
+                repo = result.repo.clone();
+                checks.push(result_to_check(&result, Utc::now()));
+            }
+        }
 
-        match check_create_attempt {
-            Ok(comment) => info!("Successfully sent {:?} to {}", comment, result.pr.number,),
-            Err(err) => info!("Failed to send check {:?} to {}", err, result.pr.number,),
+        for check in checks {
+            println!(":{:?}", check);
+
+            let check_create_attempt = self
+                .github
+                .repo(repo.owner.clone(), repo.name.clone())
+                .checkruns()
+                .create(&check);
+
+            match check_create_attempt {
+                Ok(_) => info!("Successfully sent."),
+                Err(err) => info!("Failed to send check {:?}", err),
+            }
         }
 
         vec![worker::Action::Ack]
     }
 }
 
+fn job_to_check(job: &BuildJob, architecture: &str, timestamp: DateTime<Utc>) -> CheckRunOptions {
+    let mut all_attrs: Vec<String> = job.attrs.clone();
+    all_attrs.sort();
+
+    if all_attrs.is_empty() {
+        all_attrs = vec![String::from("(unknown attributes)")];
+    }
+
+    CheckRunOptions {
+        name: format!("{} on {}", all_attrs.join(", "), architecture),
+        actions: None,
+        completed_at: None,
+        started_at: Some(timestamp.to_rfc3339_opts(chrono::SecondsFormat::Secs, true)),
+        conclusion: None,
+        details_url: Some(format!(
+            "https://logs.nix.ci/?key={}/{}.{}",
+            &job.repo.owner.to_lowercase(),
+            &job.repo.name.to_lowercase(),
+            job.pr.number,
+        )),
+        external_id: None,
+        head_sha: job.pr.head_sha.clone(),
+        output: None,
+        status: Some(CheckRunState::Queued),
+    }
+}
+
 fn result_to_check(result: &LegacyBuildResult, timestamp: DateTime<Utc>) -> CheckRunOptions {
     let mut all_attrs: Vec<String> =
         vec![result.attempted_attrs.clone(), result.skipped_attrs.clone()]
             .into_iter()
             .map(|opt| opt.unwrap_or_else(|| vec![]))
-            .flat_map(|list| list.into_iter().map(|attr| format!("-A {}", attr)))
+            .flat_map(|list| list.into_iter())
             .collect();
     all_attrs.sort();
 
@@ -76,13 +132,7 @@ fn result_to_check(result: &LegacyBuildResult, timestamp: DateTime<Utc>) -> Chec
         all_attrs = vec![String::from("(unknown attributes)")];
     }
 
-    let conclusion = match result.status {
-        BuildStatus::Skipped => Conclusion::Neutral,
-        BuildStatus::Success => Conclusion::Success,
-        BuildStatus::Failure => Conclusion::Neutral,
-        BuildStatus::TimedOut => Conclusion::Neutral,
-        BuildStatus::UnexpectedError { .. } => Conclusion::Neutral,
-    };
+    let conclusion: Conclusion = result.status.clone().into();
 
     let mut summary: Vec<String> = vec![];
     if let Some(ref attempted) = result.attempted_attrs {
@@ -118,11 +168,7 @@ fn result_to_check(result: &LegacyBuildResult, timestamp: DateTime<Utc>) -> Chec
     };
 
     CheckRunOptions {
-        name: format!(
-            "nix-build {} --argstr system {}",
-            all_attrs.join(" "),
-            result.system
-        ),
+        name: format!("{} on {}", all_attrs.join(", "), result.system),
         actions: None,
         completed_at: Some(timestamp.to_rfc3339_opts(chrono::SecondsFormat::Secs, true)),
         started_at: None,
@@ -142,68 +188,12 @@ fn result_to_check(result: &LegacyBuildResult, timestamp: DateTime<Utc>) -> Chec
             images: None,
             summary: summary.join("\n"),
             text: Some(text),
-            title: "Build Results".to_string(),
+            title: result.status.clone().into(),
         }),
         status: Some(CheckRunState::Completed),
     }
 }
 
-fn result_to_comment(result: &LegacyBuildResult) -> String {
-    let mut reply: Vec<String> = vec![];
-
-    let log_link = if !result.output.is_empty() {
-        format!(
-            " [(full log)](https://logs.nix.ci/?key={}/{}.{}&attempt_id={})",
-            &result.repo.owner.to_lowercase(),
-            &result.repo.name.to_lowercase(),
-            result.pr.number,
-            result.attempt_id,
-        )
-    } else {
-        "".to_owned()
-    };
-
-    reply.push(format!("<!--REQUEST_ID={}-->", result.request_id));
-    reply.push(format!(
-        "{} on {}{}",
-        (match result.status {
-            BuildStatus::Skipped => "No attempt".into(),
-            BuildStatus::Success => "Success".into(),
-            BuildStatus::Failure => "Failure".into(),
-            BuildStatus::TimedOut => "Timed out, unknown build status".into(),
-            BuildStatus::UnexpectedError { ref err } => format!("Unexpected error: {}", err),
-        }),
-        result.system,
-        log_link
-    ));
-    reply.push("".to_owned());
-
-    if let Some(ref attempted) = result.attempted_attrs {
-        reply.extend(list_segment("Attempted", &attempted));
-    }
-
-    if let Some(ref skipped) = result.skipped_attrs {
-        reply.extend(list_segment(
-            &format!(
-                "The following builds were skipped because they don't evaluate on {}",
-                result.system
-            ),
-            &skipped,
-        ));
-    }
-
-    if !result.output.is_empty() {
-        reply.extend(partial_log_segment(&result.output));
-        reply.push("".to_owned());
-        reply.push("".to_owned());
-    } else {
-        reply.push("No partial log is available.".to_owned());
-        reply.push("".to_owned());
-    }
-
-    reply.join("\n")
-}
-
 fn list_segment(name: &str, things: &[String]) -> Vec<String> {
     let mut reply: Vec<String> = vec![];
 
@@ -215,19 +205,6 @@ fn list_segment(name: &str, things: &[String]) -> Vec<String> {
     reply
 }
 
-fn partial_log_segment(output: &[String]) -> Vec<String> {
-    let mut reply: Vec<String> = vec![];
-
-    reply.push("<details><summary>Partial log (click to expand)</summary><p>".to_owned());
-    reply.push("".to_owned());
-    reply.push("```".to_owned());
-    reply.extend(output.to_vec());
-    reply.push("```".to_owned());
-    reply.push("</p></details>".to_owned());
-
-    reply
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -235,8 +212,8 @@ mod tests {
     use message::{Pr, Repo};
 
     #[test]
-    pub fn test_passing_build() {
-        let result = LegacyBuildResult {
+    pub fn test_queued_build() {
+        let job = BuildJob {
             repo: Repo {
                 clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
                 full_name: "NixOS/nixpkgs".to_owned(),
@@ -248,366 +225,29 @@ mod tests {
                 number: 2345,
                 target_branch: Some("master".to_owned()),
             },
-            output: vec![
-                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[2]: Nothing to be done for 'install'.".to_owned(),
-                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
-                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
-                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
-                "post-installation fixup".to_owned(),
-                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
-                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-            ],
-            attempt_id: "neatattemptid".to_owned(),
+            logs: None,
+            statusreport: None,
+            subset: None,
+
             request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: Some(vec!["foo".to_owned()]),
-            skipped_attrs: Some(vec!["bar".to_owned()]),
-            status: BuildStatus::Success,
+            attrs: vec!["foo".to_owned(), "bar".to_owned()],
         };
 
+        let timestamp = Utc.ymd(2023, 4, 20).and_hms(13, 37, 42);
         assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-Success on x86_64-linux [(full log)](https://logs.nix.ci/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
-
-Attempted: foo
-
-The following builds were skipped because they don't evaluate on x86_64-linux: bar
-
-<details><summary>Partial log (click to expand)</summary><p>
-
-```
-make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[2]: Nothing to be done for 'install'.
-make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[1]: Nothing to be done for 'install-target'.
-make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
-removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
-post-installation fixup
-strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
-patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-```
-</p></details>
-
-"
-        );
-    }
-
-    #[test]
-    pub fn test_failing_build() {
-        let result = LegacyBuildResult {
-            repo: Repo {
-                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
-                full_name: "NixOS/nixpkgs".to_owned(),
-                owner: "NixOS".to_owned(),
-                name: "nixpkgs".to_owned(),
-            },
-            pr: Pr {
-                head_sha: "abc123".to_owned(),
-                number: 2345,
-                target_branch: Some("master".to_owned()),
-            },
-            output: vec![
-                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[2]: Nothing to be done for 'install'.".to_owned(),
-                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
-                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
-                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
-                "post-installation fixup".to_owned(),
-                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
-                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-            ],
-            attempt_id: "neatattemptid".to_owned(),
-            request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: Some(vec!["foo".to_owned()]),
-            skipped_attrs: None,
-            status: BuildStatus::Failure,
-        };
-
-        assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-Failure on x86_64-linux [(full log)](https://logs.nix.ci/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
-
-Attempted: foo
-
-<details><summary>Partial log (click to expand)</summary><p>
-
-```
-make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[2]: Nothing to be done for 'install'.
-make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[1]: Nothing to be done for 'install-target'.
-make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
-removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
-post-installation fixup
-strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
-patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-```
-</p></details>
-
-"
-        );
-    }
-
-    #[test]
-    pub fn test_timedout_build() {
-        let result = LegacyBuildResult {
-            repo: Repo {
-                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
-                full_name: "NixOS/nixpkgs".to_owned(),
-                owner: "NixOS".to_owned(),
-                name: "nixpkgs".to_owned(),
-            },
-            pr: Pr {
-                head_sha: "abc123".to_owned(),
-                number: 2345,
-                target_branch: Some("master".to_owned()),
-            },
-            output: vec![
-                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[2]: Nothing to be done for 'install'.".to_owned(),
-                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
-                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
-                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
-                "post-installation fixup".to_owned(),
-                "building of '/nix/store/l1limh50lx2cx45yb2gqpv7k8xl1mik2-gdb-8.1.drv' timed out after 1 seconds".to_owned(),
-                "error: build of '/nix/store/l1limh50lx2cx45yb2gqpv7k8xl1mik2-gdb-8.1.drv' failed".to_owned(),
-            ],
-            attempt_id: "neatattemptid".to_owned(),
-            request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: Some(vec!["foo".to_owned()]),
-            skipped_attrs: None,
-            status: BuildStatus::TimedOut,
-        };
-
-        assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-Timed out, unknown build status on x86_64-linux [(full log)](https://logs.nix.ci/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
-
-Attempted: foo
-
-<details><summary>Partial log (click to expand)</summary><p>
-
-```
-make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[2]: Nothing to be done for 'install'.
-make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[1]: Nothing to be done for 'install-target'.
-make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
-removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
-post-installation fixup
-building of '/nix/store/l1limh50lx2cx45yb2gqpv7k8xl1mik2-gdb-8.1.drv' timed out after 1 seconds
-error: build of '/nix/store/l1limh50lx2cx45yb2gqpv7k8xl1mik2-gdb-8.1.drv' failed
-```
-</p></details>
-
-"
-        );
-    }
-
-    #[test]
-    pub fn test_passing_build_unspecified_attributes() {
-        let result = LegacyBuildResult {
-            repo: Repo {
-                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
-                full_name: "NixOS/nixpkgs".to_owned(),
-                owner: "NixOS".to_owned(),
-                name: "nixpkgs".to_owned(),
-            },
-            pr: Pr {
-                head_sha: "abc123".to_owned(),
-                number: 2345,
-                target_branch: Some("master".to_owned()),
-            },
-            output: vec![
-                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[2]: Nothing to be done for 'install'.".to_owned(),
-                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
-                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
-                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
-                "post-installation fixup".to_owned(),
-                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
-                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-            ],
-            attempt_id: "neatattemptid".to_owned(),
-            request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: None,
-            skipped_attrs: None,
-            status: BuildStatus::Success,
-        };
-
-        assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-Success on x86_64-linux [(full log)](https://logs.nix.ci/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
-
-<details><summary>Partial log (click to expand)</summary><p>
-
-```
-make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[2]: Nothing to be done for 'install'.
-make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[1]: Nothing to be done for 'install-target'.
-make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
-removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
-post-installation fixup
-strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
-patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-```
-</p></details>
-
-"
-        );
-    }
-
-    #[test]
-    pub fn test_failing_build_unspecified_attributes() {
-        let result = LegacyBuildResult {
-            repo: Repo {
-                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
-                full_name: "NixOS/nixpkgs".to_owned(),
-                owner: "NixOS".to_owned(),
-                name: "nixpkgs".to_owned(),
-            },
-            pr: Pr {
-                head_sha: "abc123".to_owned(),
-                number: 2345,
-                target_branch: Some("master".to_owned()),
-            },
-            output: vec![
-                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[2]: Nothing to be done for 'install'.".to_owned(),
-                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
-                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
-                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
-                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
-                "post-installation fixup".to_owned(),
-                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
-                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
-            ],
-            attempt_id: "neatattemptid".to_owned(),
-            request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: None,
-            skipped_attrs: None,
-            status: BuildStatus::Failure,
-        };
-
-        assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-Failure on x86_64-linux [(full log)](https://logs.nix.ci/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
-
-<details><summary>Partial log (click to expand)</summary><p>
-
-```
-make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[2]: Nothing to be done for 'install'.
-make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
-make[1]: Nothing to be done for 'install-target'.
-make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
-removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
-post-installation fixup
-strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
-patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
-```
-</p></details>
-
-"
-        );
-    }
-
-    #[test]
-    pub fn test_no_attempt() {
-        let result = LegacyBuildResult {
-            repo: Repo {
-                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
-                full_name: "NixOS/nixpkgs".to_owned(),
-                owner: "NixOS".to_owned(),
-                name: "nixpkgs".to_owned(),
-            },
-            pr: Pr {
-                head_sha: "abc123".to_owned(),
-                number: 2345,
-                target_branch: Some("master".to_owned()),
-            },
-            output: vec!["foo".to_owned()],
-            attempt_id: "foo".to_owned(),
-            request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: None,
-            skipped_attrs: Some(vec!["not-attempted".to_owned()]),
-            status: BuildStatus::Skipped,
-        };
-
-        assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-No attempt on x86_64-linux [(full log)](https://logs.nix.ci/?key=nixos/nixpkgs.2345&attempt_id=foo)
-
-The following builds were skipped because they don't evaluate on x86_64-linux: not-attempted
-
-<details><summary>Partial log (click to expand)</summary><p>
-
-```
-foo
-```
-</p></details>
-
-"
-        );
-    }
-
-    #[test]
-    pub fn test_no_attempt_no_log() {
-        let result = LegacyBuildResult {
-            repo: Repo {
-                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
-                full_name: "NixOS/nixpkgs".to_owned(),
-                owner: "NixOS".to_owned(),
-                name: "nixpkgs".to_owned(),
-            },
-            pr: Pr {
-                head_sha: "abc123".to_owned(),
-                number: 2345,
-                target_branch: Some("master".to_owned()),
-            },
-            output: vec![],
-            attempt_id: "foo".to_owned(),
-            request_id: "bogus-request-id".to_owned(),
-            system: "x86_64-linux".to_owned(),
-            attempted_attrs: None,
-            skipped_attrs: Some(vec!["not-attempted".to_owned()]),
-            status: BuildStatus::Skipped,
-        };
-
-        assert_eq!(
-            &result_to_comment(&result),
-            "<!--REQUEST_ID=bogus-request-id-->
-No attempt on x86_64-linux
-
-The following builds were skipped because they don't evaluate on x86_64-linux: not-attempted
-
-No partial log is available.
-"
+            job_to_check(&job, "x86_64-linux", timestamp),
+            CheckRunOptions {
+                name: "bar, foo on x86_64-linux".to_string(),
+                actions: None,
+                started_at: Some("2023-04-20T13:37:42Z".to_string()),
+                completed_at: None,
+                status: Some(CheckRunState::Queued),
+                conclusion: None,
+                details_url: Some("https://logs.nix.ci/?key=nixos/nixpkgs.2345".to_string()),
+                external_id: None,
+                head_sha: "abc123".to_string(),
+                output: None,
+            }
         );
     }
 
@@ -650,7 +290,7 @@ No partial log is available.
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build -A bar -A foo --argstr system x86_64-linux".to_string(),
+                name: "bar, foo on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -663,7 +303,7 @@ No partial log is available.
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "Success".to_string(),
                     summary: "Attempted: foo
 
 The following builds were skipped because they don't evaluate on x86_64-linux: bar
@@ -732,7 +372,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build -A foo --argstr system x86_64-linux".to_string(),
+                name: "foo on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -745,7 +385,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "Failure".to_string(),
                     summary: "Attempted: foo
 "
                     .to_string(),
@@ -811,7 +451,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build -A foo --argstr system x86_64-linux".to_string(),
+                name: "foo on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -824,7 +464,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "Timed out, unknown build status".to_string(),
                     summary: "Attempted: foo
 
 Build timed out."
@@ -891,7 +531,7 @@ error: build of '/nix/store/l1limh50lx2cx45yb2gqpv7k8xl1mik2-gdb-8.1.drv' failed
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build (unknown attributes) --argstr system x86_64-linux".to_string(),
+                name: "(unknown attributes) on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -904,7 +544,7 @@ error: build of '/nix/store/l1limh50lx2cx45yb2gqpv7k8xl1mik2-gdb-8.1.drv' failed
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "Success".to_string(),
                     summary: "".to_string(),
                     text: Some(
                         "## Partial log
@@ -969,7 +609,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build (unknown attributes) --argstr system x86_64-linux".to_string(),
+                name: "(unknown attributes) on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -982,7 +622,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "Failure".to_string(),
                     summary: "".to_string(),
                     text: Some(
                         "## Partial log
@@ -1036,7 +676,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build -A not-attempted --argstr system x86_64-linux".to_string(),
+                name: "not-attempted on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -1046,7 +686,7 @@ patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "No attempt".to_string(),
                     summary: "The following builds were skipped because they don\'t evaluate on x86_64-linux: not-attempted
 ".to_string(),
                     text: Some("## Partial log
@@ -1089,7 +729,7 @@ foo
         assert_eq!(
             result_to_check(&result, timestamp),
             CheckRunOptions {
-                name: "nix-build -A not-attempted --argstr system x86_64-linux".to_string(),
+                name: "not-attempted on x86_64-linux".to_string(),
                 actions: None,
                 started_at: None,
                 completed_at: Some("2023-04-20T13:37:42Z".to_string()),
@@ -1099,7 +739,7 @@ foo
                 external_id: Some("neatattemptid".to_string()),
                 head_sha: "abc123".to_string(),
                 output: Some(Output {
-                    title: "Build Results".to_string(),
+                    title: "No attempt".to_string(),
                     summary: "The following builds were skipped because they don\'t evaluate on x86_64-linux: not-attempted
 ".to_string(),
                     text: Some("No partial log is available.".to_string()),
diff --git a/ofborg/src/tasks/massrebuilder.rs b/ofborg/src/tasks/massrebuilder.rs
index 6d3274d..557baee 100644
--- a/ofborg/src/tasks/massrebuilder.rs
+++ b/ofborg/src/tasks/massrebuilder.rs
@@ -18,6 +18,7 @@ use ofborg::nix;
 use ofborg::outpathdiff::{OutPathDiff, OutPaths};
 use ofborg::stats;
 use ofborg::stats::Event;
+use ofborg::systems;
 use ofborg::tagger::{PathsTagger, PkgsAddedRemovedTagger, RebuildTagger, StdenvTagger};
 use ofborg::worker;
 use std::collections::HashMap;
@@ -123,7 +124,7 @@ impl<E: stats::SysEvents + 'static> worker::SimpleWorker for MassRebuildWorker<E
         let pull = pulls.get(job.pr.number);
         let issue = repo.issue(job.pr.number);
 
-        let auto_schedule_build_archs: Vec<buildjob::ExchangeQueue>;
+        let auto_schedule_build_archs: Vec<systems::System>;
 
         match issue.get() {
             Ok(iss) => {
@@ -136,9 +137,10 @@ impl<E: stats::SysEvents + 'static> worker::SimpleWorker for MassRebuildWorker<E
                 if issue_is_wip(&iss) {
                     auto_schedule_build_archs = vec![];
                 } else {
-                    auto_schedule_build_archs = self
-                        .acl
-                        .build_job_destinations_for_user_repo(&iss.user.login, &job.repo.full_name);
+                    auto_schedule_build_archs = self.acl.build_job_architectures_for_user_repo(
+                        &iss.user.login,
+                        &job.repo.full_name,
+                    );
                 }
             }
             Err(e) => {
@@ -464,9 +466,21 @@ impl<E: stats::SysEvents + 'static> worker::SimpleWorker for MassRebuildWorker<E
                             None,
                             format!("{}", Uuid::new_v4()),
                         );
-                        for (dest, rk) in auto_schedule_build_archs {
-                            response.push(worker::publish_serde_action(dest, rk, &msg));
+                        for arch in auto_schedule_build_archs.iter() {
+                            let (exchange, routingkey) = arch.as_build_destination();
+                            response.push(worker::publish_serde_action(exchange, routingkey, &msg));
                         }
+                        response.push(worker::publish_serde_action(
+                            Some("build-results".to_string()),
+                            None,
+                            &buildjob::QueuedBuildJobs {
+                                job: msg,
+                                architectures: auto_schedule_build_archs
+                                    .into_iter()
+                                    .map(|arch| arch.to_string())
+                                    .collect(),
+                            },
+                        ));
                     }
                 }
                 Err(mut out) => {