diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c595f4b..c61bf88 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -38,7 +38,6 @@ jobs:
               "nixos-unstable",
               "nixos-24.05",
               "nixos-24.11",
-              "ce40ce79f14469fd17dfe41c9b51490495d3f99e",
             empty] as $nixpkgss |
             
             [
diff --git a/default.nix b/default.nix
index 1aa23fb..2e8c4bd 100644
--- a/default.nix
+++ b/default.nix
@@ -130,15 +130,25 @@ in {
     });
     
     fpc = let
-        needsFix = pkgs.hostPlatform.isDarwin && !(pkgs.lib.hasInfix "-syslibroot $SDKROOT" (pkgs.fpc.preConfigure or ""));
-    in pkgs.fpc.overrideAttrs (old: {
-        preConfigure = pkgs.lib.optionalString needsFix ''
-            NIX_LDFLAGS="-syslibroot $SDKROOT -L${pkgs.lib.getLib pkgs.libiconv}/lib"
-        '' + (old.preConfigure or "");
-        meta = old.meta // {
-            description = "${old.meta.description or "fpc"} (fixed for macOS/Darwin)";
+        inherit (pkgs) fpc lib;
+        needsFix =
+            pkgs.hostPlatform.isDarwin && 
+            !(lib.hasInfix "-syslibroot $SDKROOT" (fpc.preConfigure or ""))
+        ;
+        nixpkgs-fpc-fix = pkgs.fetchFromGitHub {
+            name = "nixpkgs-fpc-fix";
+            owner = "NixOS";
+            repo = "nixpkgs";
+            rev = "ce40ce79f14469fd17dfe41c9b51490495d3f99e";
+            sparseCheckout = [
+                "pkgs/development/compilers/fpc"
+            ];
+            nonConeMode = true;
+            hash = "sha256-fumRYQgvlsLLT48JPNbmP5VZD3D4C6XTfSKxiCDKIno=";
         };
-    });
+    in lib.addMetaAttrs ({
+        description = "${fpc.meta.description or "fpc"} (fixed for macOS/Darwin)";
+    }) (if needsFix then pkgs.callPackage "${nixpkgs-fpc-fix}/pkgs/development/compilers/fpc/" {} else fpc);
     
     drl-packages = callPackage ./pkgs/drl/packages.nix {};
     inherit (self.drl-packages) drl drl-hq drl-lq;