diff --git a/pkgs/development/libraries/libunique/default.nix b/pkgs/development/libraries/libunique/default.nix
index b96fdf5eeddc..e0022411221d 100644
--- a/pkgs/development/libraries/libunique/default.nix
+++ b/pkgs/development/libraries/libunique/default.nix
@@ -9,7 +9,8 @@ stdenv.mkDerivation rec {
     sha256 = "1fsgvmncd9caw552lyfg8swmsd6bh4ijjsph69bwacwfxwf09j75";
   };
 
-  NIX_CFLAGS_COMPILE = "-Wno-error=deprecated-declarations";
+  # glib-2.62 deprecations
+  NIX_CFLAGS_COMPILE = [ "-DGLIB_DISABLE_DEPRECATION_WARNINGS" ];
 
   # Patches from Gentoo portage
   patches = [