diff --git a/pkgs/by-name/ca/catclock/package.nix b/pkgs/by-name/ca/catclock/package.nix
index 4d2d81aa282b..54fff59769e6 100644
--- a/pkgs/by-name/ca/catclock/package.nix
+++ b/pkgs/by-name/ca/catclock/package.nix
@@ -26,7 +26,10 @@ stdenv.mkDerivation {
     cp xclock.man $out/share/man/man1/xclock.1
   '';
 
-  makeFlags = [ "DESTINATION=$(out)/bin/" ] ++ lib.optional withAudioTracking "WITH_TEMPO_TRACKER=1";
+  makeFlags = [
+    "DESTINATION=$(out)/bin/"
+    "CFLAGS=-Wno-incompatible-pointer-types"
+  ] ++ lib.optional withAudioTracking "WITH_TEMPO_TRACKER=1";
 
   buildInputs =
     [