diff --git a/nix/sources.json b/nix/sources.json
index dcded66..ab567f8 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -71,7 +71,10 @@
         "branch": "main",
         "repo": "https://gitlab.com/hexchen/nixfiles.git",
         "rev": "83b511d9a3754ded187891c711b3dbbef82887d3",
-        "type": "git"
+        "sha256": "1024vl0bgmcb8g91pqcqc601xh90nxp82p0z9imp11fwb1fx7756",
+        "type": "tarball",
+        "url": "https://gitlab.com/hexchen/nixfiles/-/archive/83b511d9a3754ded187891c711b3dbbef82887d3/nixfiles-83b511d9a3754ded187891c711b3dbbef82887d3.tar.gz",
+        "url_template": "<repo>/-/archive/<rev>.tar.gz"
     },
     "nixos-mailserver": {
         "ref": "nixos-20.09",