diff --git a/pkgs/by-name/gt/gtksheet/package.nix b/pkgs/by-name/gt/gtksheet/package.nix
index cf325855cdc6..b4f952077b19 100644
--- a/pkgs/by-name/gt/gtksheet/package.nix
+++ b/pkgs/by-name/gt/gtksheet/package.nix
@@ -41,6 +41,8 @@ stdenv.mkDerivation (finalAttrs: {
     pango
   ];
 
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=incompatible-pointer-types";
+
   meta = {
     description = "Spreadsheet widget for GTK+";
     homepage = "https://fpaquet.github.io/gtksheet/";