diff --git a/pkgs/by-name/sm/smplayer/package.nix b/pkgs/by-name/sm/smplayer/package.nix
index c04611cab071..470d505ea197 100644
--- a/pkgs/by-name/sm/smplayer/package.nix
+++ b/pkgs/by-name/sm/smplayer/package.nix
@@ -26,10 +26,15 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [ qtscript ];
 
+  enableParallelBuilding = true;
+
   dontUseQmakeConfigure = true;
 
   makeFlags = [ "PREFIX=${placeholder "out"}" ];
 
+  # https://github.com/smplayer-dev/smplayer/issues/1318
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=unused-but-set-variable";
+
   meta = {
     homepage = "https://www.smplayer.info";
     description = "Complete front-end for MPlayer";