diff --git a/pkgs/by-name/gt/gtk-gnutella/package.nix b/pkgs/by-name/gt/gtk-gnutella/package.nix
index eb22ca254827..c5a0f2a989b6 100644
--- a/pkgs/by-name/gt/gtk-gnutella/package.nix
+++ b/pkgs/by-name/gt/gtk-gnutella/package.nix
@@ -53,6 +53,9 @@ stdenv.mkDerivation (finalAttrs: {
     "--topless"
   ];
 
+  # Classic 'incompatible pointer type'
+  env.NIX_CFLAGS_COMPILE = "-std=gnu17";
+
   enableParallelBuilding = true;
 
   postInstall = ''