fpc: mark broken with Clang on x86‐64

This is only really relevant to `x86_64-darwin`, and it’s not worth
keeping an unmaintained LLVM around for given the limited remaining
lifespan of the platform.

pkgs/development/compilers/fpc/default.nix

@@ -111,5 +111,9 @@ stdenv.mkDerivation rec {
       lgpl2
     ];
     platforms = platforms.unix;
+    # See:
+    # * <https://gitlab.com/freepascal.org/fpc/source/-/issues/41045>
+    # * <https://gitlab.com/freepascal.org/fpc/source/-/merge_requests/887>
+    broken = stdenv.cc.isClang && stdenv.hostPlatform.isx86_64;
   };
 }

pkgs/top-level/all-packages.nix

@@ -4732,13 +4732,7 @@ with pkgs;
   flutter327 = flutterPackages.v3_27;
   flutter324 = flutterPackages.v3_24;
 
-  fpc = callPackage ../development/compilers/fpc {
-    # https://github.com/NixOS/nixpkgs/issues/416485
-    # TODO: remove when upstream issue is fixed:
-    # https://gitlab.com/freepascal.org/fpc/source/-/issues/41045
-    stdenv =
-      if stdenv.cc.isClang && stdenv.hostPlatform.isx86_64 then llvmPackages_17.stdenv else stdenv;
-  };
+  fpc = callPackage ../development/compilers/fpc { };
 
   gambit = callPackage ../development/compilers/gambit { };
   gambit-unstable = callPackage ../development/compilers/gambit/unstable.nix { };