diff --git a/pkgs/development/libraries/libomxil-bellagio/default.nix b/pkgs/development/libraries/libomxil-bellagio/default.nix
index 027c0b8f499d..2b5d37fad2ec 100644
--- a/pkgs/development/libraries/libomxil-bellagio/default.nix
+++ b/pkgs/development/libraries/libomxil-bellagio/default.nix
@@ -35,7 +35,9 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE =
     # stringop-truncation: see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1028978
     if stdenv.cc.isGNU then "-Wno-error=array-bounds -Wno-error=stringop-overflow=8 -Wno-error=stringop-truncation"
-    else "-Wno-error=absolute-value -Wno-error=enum-conversion -Wno-error=logical-not-parentheses -Wno-error=non-literal-null-conversion";
+    else let
+      isLLVM17 = stdenv.cc.bintools.isLLVM && lib.versionAtLeast stdenv.cc.bintools.version "17";
+    in "-Wno-error=absolute-value -Wno-error=enum-conversion -Wno-error=logical-not-parentheses -Wno-error=non-literal-null-conversion${lib.optionalString (isLLVM17) " -Wno-error=unused-but-set-variable"}";
 
   meta = with lib; {
     homepage = "https://omxil.sourceforge.net/";