diff --git a/default.nix b/default.nix
index 25474b0..681521f 100644
--- a/default.nix
+++ b/default.nix
@@ -58,6 +58,7 @@ in
     FONTCONFIG_FILE = pkgs.makeFontsConf {
       fontDirectories = with pkgs; [ libertinus julia-mono ];
     };
+   XDG_CACHE_HOME = "$NIX_BUILD_TOP";
 
     enableParallelBuilding = true;