1 files changed, 3 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/tools/text/xml/rxp/default.nix b/nixpkgs/pkgs/tools/text/xml/rxp/default.nix
index 918a491ede38..b45c89af1c03 100644
--- a/nixpkgs/pkgs/tools/text/xml/rxp/default.nix
+++ b/nixpkgs/pkgs/tools/text/xml/rxp/default.nix
@@ -9,10 +9,13 @@ stdenv.mkDerivation rec {
     sha256 = "0y365r36wzj4xn1dzhb03spxljnrx8vwqbiwnnwz4630129gzpm6";
   };
 
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=implicit-function-declaration -Wno-error=int-conversion";
+
   meta = {
     license = lib.licenses.gpl2Plus;
     description = "A validating XML parser written in C";
     homepage = "https://www.cogsci.ed.ac.uk/~richard/rxp.html";
     platforms = lib.platforms.unix;
+    mainProgram = "rxp";
   };
 }