diff --git a/services/site-max.nix b/services/site-max.nix
index 95132dc..f5cccbe 100644
--- a/services/site-max.nix
+++ b/services/site-max.nix
@@ -66,7 +66,7 @@ in
             git -C $GIT_CLONE_DIR pull
           fi
 
-          nix-build -o /run/site-max/result $GIT_CLONE_DIR
+          NIXPKGS_ALLOW_UNFREE=1 nix-build -o /run/site-max/result $GIT_CLONE_DIR
         ''}/bin/build.sh";
       };
     };