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-rw-r--r--pkgs/servers/search/groonga/default.nix5
1 files changed, 5 insertions, 0 deletions
diff --git a/pkgs/servers/search/groonga/default.nix b/pkgs/servers/search/groonga/default.nix
index 7b7717828e1..fbf9f06cff7 100644
--- a/pkgs/servers/search/groonga/default.nix
+++ b/pkgs/servers/search/groonga/default.nix
@@ -31,6 +31,11 @@ stdenv.mkDerivation rec {
        optional zlibSupport "--with-zlib"
     ++ optional lz4Support  "--with-lz4";
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    # Prevent warning about using a GNU extension from being promoted to an error.
+    NIX_CFLAGS_COMPILE = "-Wno-error=gnu-folding-constant";
+  };
+
   doInstallCheck    = true;
   installCheckPhase = "$out/bin/groonga --version";