u9fs 2021-01-25 -> 20210125 https://repology.org/project/u9fs/versions
attrpath: u9fs
Checking auto update branch...
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[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/servers/u9fs/default.nix b/pkgs/servers/u9fs/default.nix
index 9056b4791672..783f4c86162f 100644
--- a/pkgs/servers/u9fs/default.nix
+++ b/pkgs/servers/u9fs/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation {
   pname = "u9fs";
-  version = "unstable-2021-01-25";
+  version = "unstable-20210125";
 
   src = fetchFromBitbucket {
     owner = "plan9-from-bell-labs";
     repo = "u9fs";
     rev = "d65923fd17e8b158350d3ccd6a4e32b89b15014a";
-    sha256 = "0h06l7ciikp3gzrr550z0fyrfp3y2067dfd3rxxw0q95z4l6vhy1";
+    sha256 = "sha256-wcNtKPklYcB7z6O5dgwQflyXvQMflJLzf+POGNmhBkA=";
   };
 
   installPhase = ''

Source url did not change.