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-rw-r--r--pkgs/stdenv/darwin/default.nix19
1 files changed, 9 insertions, 10 deletions
diff --git a/pkgs/stdenv/darwin/default.nix b/pkgs/stdenv/darwin/default.nix
index 24dc30692fa5..951c96877f96 100644
--- a/pkgs/stdenv/darwin/default.nix
+++ b/pkgs/stdenv/darwin/default.nix
@@ -294,7 +294,7 @@ in rec {
     extraPreHook = ''
       export PATH_LOCALE=${pkgs.darwin.locale}/share/locale
     '';
-    overrides = self: super: (persistent self super) // {
+    overrides = lib.composeExtensions persistent (self: super: {
       # Hack to make sure we don't link ncurses in bootstrap tools. The proper
       # solution is to avoid passing -L/nix-store/...-bootstrap-tools/lib,
       # quite a sledgehammer just to get the C runtime.
@@ -303,7 +303,7 @@ in rec {
            "--disable-curses"
          ];
       });
-    };
+    });
   };
 
   stdenvDarwin = prevStage: let
@@ -386,16 +386,15 @@ in rec {
       dyld Libsystem CF cctools ICU libiconv locale
     ]);
 
-    overrides = self: super:
-      let persistent' = persistent self super; in persistent' // {
-        clang = cc;
-        llvmPackages = persistent'.llvmPackages // { clang = cc; };
-        inherit cc;
+    overrides = lib.composeExtensions persistent (self: super: {
+      clang = cc;
+      llvmPackages = super.llvmPackages // { clang = cc; };
+      inherit cc;
 
-        darwin = super.darwin // {
-          xnu = super.darwin.xnu.override { python = super.python.override { configd = null; }; };
-        };
+      darwin = super.darwin // {
+        xnu = super.darwin.xnu.override { python = super.python.override { configd = null; }; };
       };
+    });
   };
 
   stagesDarwin = [