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-rw-r--r--nixpkgs/pkgs/applications/networking/browsers/firefox/common.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/applications/networking/browsers/firefox/common.nix b/nixpkgs/pkgs/applications/networking/browsers/firefox/common.nix
index a5c92cafee54..f4e2e067a01b 100644
--- a/nixpkgs/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/nixpkgs/pkgs/applications/networking/browsers/firefox/common.nix
@@ -263,7 +263,7 @@ buildStdenv.mkDerivation ({
     "--with-system-nss"
   ]
   ++ lib.optional (buildStdenv.isDarwin) "--disable-xcode-checks"
-  ++ lib.optional (!ltoSupport) "--with-clang-path=${llvmPackages.clang}/bin/clang"
+  ++ lib.optional (!ltoSupport && !stdenv.cc.isClang) "--with-clang-path=${llvmPackages.clang}/bin/clang"
   # LTO is done using clang and lld on Linux.
   # Darwin needs to use the default linker as lld is not supported (yet?):
   #   https://bugzilla.mozilla.org/show_bug.cgi?id=1538724