diff --git a/tools/cheddar/default.nix b/tools/cheddar/default.nix
index c8d7ba5ff..8d37694c0 100644
--- a/tools/cheddar/default.nix
+++ b/tools/cheddar/default.nix
@@ -9,4 +9,15 @@ depot.third_party.naersk.buildPackage {
     # plus additional languages we care about.
     BAT_SYNTAXES = "${depot.third_party.bat_syntaxes}";
   };
+
+  passthru = {
+    # Wrapper for cgit which can't be told to pass arguments to a filter
+    about-filter = pkgs.writeShellScriptBin "cheddar-about" ''
+      exec ${depot.tools.cheddar}/bin/cheddar --about-filter $@
+    '';
+  };
+
+  meta.targets = [
+    "about-filter"
+  ];
 }
diff --git a/web/cgit-taz/default.nix b/web/cgit-taz/default.nix
index 83ec822e5..d20bbbe31 100644
--- a/web/cgit-taz/default.nix
+++ b/web/cgit-taz/default.nix
@@ -10,15 +10,12 @@ let
     writeText
     ;
 
-  sourceFilter = writeShellScriptBin "cheddar-about" ''
-    exec ${depot.tools.cheddar}/bin/cheddar --about-filter $@
-  '';
   cgitConfig = writeText "cgitrc" ''
     # Global configuration
     virtual-root=/
     enable-http-clone=0
     readme=:README.md
-    about-filter=${sourceFilter}/bin/cheddar-about
+    about-filter=${depot.tools.cheddar.about-filter}/bin/cheddar-about
     source-filter=${depot.tools.cheddar}/bin/cheddar
     enable-log-filecount=1
     enable-log-linecount=1