diff --git a/pkgs/development/compilers/clasp/default.nix b/pkgs/development/compilers/clasp/default.nix
index 6d9ff74087d8..04d6951c402a 100644
--- a/pkgs/development/compilers/clasp/default.nix
+++ b/pkgs/development/compilers/clasp/default.nix
@@ -90,7 +90,10 @@ in llvmPackages_15.stdenv.mkDerivation {
     description = "A Common Lisp implementation based on LLVM with C++ integration";
     license = lib.licenses.lgpl21Plus ;
     maintainers = [lib.maintainers.raskin lib.maintainers.uthar];
-    platforms = lib.platforms.linux;
+    platforms = ["x86_64-linux" "x86_64-darwin"];
+    # Upstream claims support, but breaks with:
+    # error: use of undeclared identifier 'aligned_alloc'
+    broken = llvmPackages_15.stdenv.isDarwin;
     homepage = "https://github.com/clasp-developers/clasp";
   };