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-rw-r--r--pkgs/tools/backup/bup/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/tools/backup/bup/default.nix b/pkgs/tools/backup/bup/default.nix
index 7bea67dc621b..4b9951f2e2ea 100644
--- a/pkgs/tools/backup/bup/default.nix
+++ b/pkgs/tools/backup/bup/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation {
     "LIBDIR=$(out)/lib/bup"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-error=implicit-function-declaration";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=implicit-function-declaration -Wno-error=implicit-int";
 
   postInstall = ''
     wrapProgram $out/bin/bup \