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/systems.rs b/ofborg/src/systems.rs
new file mode 100644
index 0000000..4bb1c05
--- /dev/null
+++ b/ofborg/src/systems.rs
@@ -0,0 +1,19 @@
+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())))
+    }
+}