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-rw-r--r--nixpkgs/pkgs/development/libraries/clucene-core/2.x.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/libraries/clucene-core/2.x.nix b/nixpkgs/pkgs/development/libraries/clucene-core/2.x.nix
index 6eb310550bcd..91347813a24f 100644
--- a/nixpkgs/pkgs/development/libraries/clucene-core/2.x.nix
+++ b/nixpkgs/pkgs/development/libraries/clucene-core/2.x.nix
@@ -36,6 +36,8 @@ stdenv.mkDerivation rec {
   # /build/clucene-core-2.3.3.4/build/bin/cl_test"
   doCheck = false;
 
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.cc.isClang "-Wno-error=c++11-narrowing";
+
   meta = with stdenv.lib; {
     description = "Core library for full-featured text search engine";
     longDescription = ''