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Diffstat (limited to 'nixpkgs/pkgs/tools/graphics/netpbm/default.nix')
-rw-r--r--nixpkgs/pkgs/tools/graphics/netpbm/default.nix4
1 files changed, 4 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/tools/graphics/netpbm/default.nix b/nixpkgs/pkgs/tools/graphics/netpbm/default.nix
index dd446fb26c75..105169c5e030 100644
--- a/nixpkgs/pkgs/tools/graphics/netpbm/default.nix
+++ b/nixpkgs/pkgs/tools/graphics/netpbm/default.nix
@@ -95,6 +95,10 @@ stdenv.mkDerivation {
     runHook postConfigure
   '';
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration";
+  };
+
   installPhase = ''
     runHook preInstall