diff --git a/pkgs/by-name/mu/muon/darwin-clang.patch b/pkgs/by-name/mu/muon/darwin-clang.patch
new file mode 100644
index 000000000000..170e7864c630
--- /dev/null
+++ b/pkgs/by-name/mu/muon/darwin-clang.patch
@@ -0,0 +1,15 @@
+diff --git a/src/functions/kernel/dependency.c b/src/functions/kernel/dependency.c
+index fbfc86f6..46f9be9d 100644
+--- a/src/functions/kernel/dependency.c
++++ b/src/functions/kernel/dependency.c
+@@ -377,10 +377,6 @@ get_dependency_extraframework(struct workspace *wk, struct dep_lookup_ctx *ctx,
+ 	}
+ 
+ 	struct obj_compiler *comp = get_obj_compiler(wk, compiler);
+-	if (comp->type[toolchain_component_compiler] != compiler_apple_clang) {
+-		L("skipping extraframework dependency lookup: compiler type is not apple clang");
+-		return true;
+-	}
+ 
+ 	if (!comp->fwdirs) {
+ 		obj cmd;
diff --git a/pkgs/by-name/mu/muon/package.nix b/pkgs/by-name/mu/muon/package.nix
index 18a2d2987e46..eed22dd00eab 100644
--- a/pkgs/by-name/mu/muon/package.nix
+++ b/pkgs/by-name/mu/muon/package.nix
@@ -74,6 +74,8 @@ stdenv.mkDerivation (finalAttrs: {
     done
   '';
 
+  patches = [ ./darwin-clang.patch ];
+
   postPatch = ''
     find subprojects/meson-tests -name "*.py" -exec chmod +x {} \;
     patchShebangs .
@@ -133,6 +135,9 @@ stdenv.mkDerivation (finalAttrs: {
   checkPhase = ''
     runHook preCheck
 
+    ${lib.optionalString (
+      stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
+    ) "NIX_BUILD_CORES=1"}
     ./stage-3/muon -C stage-3 test -d dots -S -j$NIX_BUILD_CORES
 
     runHook postCheck
@@ -152,7 +157,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ ];
     platforms = platforms.unix;
-    broken = stdenv.hostPlatform.isDarwin; # typical `ar failure`
     mainProgram = "muon";
   };
 })