diff --git a/pkgs/applications/version-management/fnc/default.nix b/pkgs/applications/version-management/fnc/default.nix
index 7fd1b34d4560..b74200a6919c 100644
--- a/pkgs/applications/version-management/fnc/default.nix
+++ b/pkgs/applications/version-management/fnc/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "PREFIX=$(out)" ];
 
-  NIX_CFLAGS_COMPILE = [
+  NIX_CFLAGS_COMPILE = lib.optionals stdenv.cc.isGNU [
     # Needed with GCC 12
     "-Wno-error=maybe-uninitialized"
   ];