diff --git a/README.md b/README.md
index fc66195..bb50a45 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ platforms:
  - `x86_64-linux`
  - `aarch64-linux`
  - `x86_64-darwin`
+ - `aarch64-darwin`
 
 See [`config.public.json`](./config.public.json) for a list of all trusted users.
 
diff --git a/ofborg/src/acl.rs b/ofborg/src/acl.rs
index 6fa9886..dabc11e 100644
--- a/ofborg/src/acl.rs
+++ b/ofborg/src/acl.rs
@@ -26,6 +26,7 @@ impl Acl {
             vec![
                 System::X8664Darwin,
                 System::X8664Linux,
+                System::Aarch64Darwin,
                 System::Aarch64Linux,
             ]
         } else {
diff --git a/ofborg/src/outpaths.nix b/ofborg/src/outpaths.nix
index 483fcf2..8793f36 100755
--- a/ofborg/src/outpaths.nix
+++ b/ofborg/src/outpaths.nix
@@ -11,6 +11,7 @@ let
     {
       supportedSystems = [
         "aarch64-linux"
+        # "aarch64-darwin" # !!!
         "i686-linux"
         "x86_64-linux"
         "x86_64-darwin"
@@ -26,11 +27,13 @@ let
           handleEvalIssue = reason: errormsg:
             let
               fatalErrors = [
-                "unknown-meta" "broken-outputs"
+                "unknown-meta"
+                "broken-outputs"
               ];
-            in if builtins.elem reason fatalErrors
-              then abort errormsg
-              else true;
+            in
+            if builtins.elem reason fatalErrors
+            then abort errormsg
+            else true;
 
           inHydra = true;
         };
@@ -44,17 +47,22 @@ let
     (name: val:
       if name == "recurseForDerivations" then true
       else if lib.isAttrs val && val.type or null != "derivation"
-              then recurseIntoAttrs (tweak val)
+      then recurseIntoAttrs (tweak val)
       else val
     );
 
   # Some of these contain explicit references to platform(s) we want to avoid;
   # some even (transitively) depend on ~/.nixpkgs/config.nix (!)
   blacklist = [
-    "tarball" "metrics" "manual"
-    "darwin-tested" "unstable" "stdenvBootstrapTools"
-    "moduleSystem" "lib-tests" # these just confuse the output
+    "tarball"
+    "metrics"
+    "manual"
+    "darwin-tested"
+    "unstable"
+    "stdenvBootstrapTools"
+    "moduleSystem"
+    "lib-tests" # these just confuse the output
   ];
 
 in
-  tweak (builtins.removeAttrs hydraJobs blacklist)
+tweak (builtins.removeAttrs hydraJobs blacklist)
diff --git a/ofborg/src/systems.rs b/ofborg/src/systems.rs
index f296270..0454455 100644
--- a/ofborg/src/systems.rs
+++ b/ofborg/src/systems.rs
@@ -3,6 +3,7 @@ pub enum System {
     X8664Linux,
     Aarch64Linux,
     X8664Darwin,
+    Aarch64Darwin,
 }
 
 impl std::fmt::Display for System {
@@ -11,6 +12,7 @@ impl std::fmt::Display for System {
             System::X8664Linux => write!(f, "x86_64-linux"),
             System::Aarch64Linux => write!(f, "aarch64-linux"),
             System::X8664Darwin => write!(f, "x86_64-darwin"),
+            System::Aarch64Darwin => write!(f, "aarch64-darwin"),
         }
     }
 }
@@ -25,6 +27,7 @@ impl System {
             System::X8664Linux => true,
             System::Aarch64Linux => true,
             System::X8664Darwin => false,
+            System::Aarch64Darwin => false,
         }
     }
 }
diff --git a/release.nix b/release.nix
index bee79b2..c43b03f 100644
--- a/release.nix
+++ b/release.nix
@@ -1,5 +1,5 @@
 { nixpkgs ? ./nix
-, supportedSystems ? [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" ]
+, supportedSystems ? [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ]
 }:
 let
   pkgs = import nixpkgs {
@@ -26,19 +26,23 @@ let
         };
       }
     )
-    {} supportedSystems;
+    { }
+    supportedSystems;
 
   attrForSystem = system: attrpath:
     if borgpkgs-per-arch ? "${system}"
-    then (
-      let
-        borgpkgs = borgpkgs-per-arch."${system}";
-      in if lib.hasAttrByPath attrpath borgpkgs
-        then lib.setAttrByPath
-          (attrpath ++ [system])
-          (lib.attrByPath attrpath "bogus" borgpkgs)
+    then
+      (
+        let
+          borgpkgs = borgpkgs-per-arch."${system}";
+        in
+        if lib.hasAttrByPath attrpath borgpkgs
+        then
+          lib.setAttrByPath
+            (attrpath ++ [ system ])
+            (lib.attrByPath attrpath "bogus" borgpkgs)
         else throw "Failed to find ${toString attrpath} for ${system} in borgpkgs"
-    )
+      )
     else throw "No such system ${system}";
 
   attrsForAllSystems = path:
@@ -46,31 +50,33 @@ let
       (collector: system:
         lib.recursiveUpdate collector (attrForSystem system path)
       )
-      {}
+      { }
       supportedSystems;
 
   merge = attrsets:
     builtins.foldl'
       (collector: set: lib.recursiveUpdate set collector)
-      {}
+      { }
       attrsets;
 
   x8664LinuxOnly = path:
-     (attrForSystem "x86_64-linux" path);
+    (attrForSystem "x86_64-linux" path);
 
   jobs = merge [
     (attrsForAllSystems [ "ofborg" "rs" ])
 
     (x8664LinuxOnly [ "ofborg" "php" ])
   ];
-in jobs // {
+in
+jobs // {
   release = pkgs.releaseTools.aggregate {
     name = "release";
     meta.description = "Release-critical builds for OfBorg infrastructure";
     constituents = [
       jobs.ofborg.rs.x86_64-linux
       jobs.ofborg.rs.x86_64-darwin
-      # jobs.ofborg.rs.aarch64-linux
+      jobs.ofborg.rs.aarch64-darwin
+      jobs.ofborg.rs.aarch64-linux
       jobs.ofborg.php.x86_64-linux
     ];
   };