diff --git a/nix/srcds/default.nix b/nix/srcds/default.nix
index 21e44fe..10ce7c4 100644
--- a/nix/srcds/default.nix
+++ b/nix/srcds/default.nix
@@ -20,38 +20,13 @@
   pkgsCross,
   requireFile,
 }: let
-  inherit (lib) importJSON map toString elem last replaceStrings naturalSort filter any optionals optionalString;
+  inherit (lib) importJSON map last replaceStrings naturalSort filter any optionals optionalString;
   depotInputs = importJSON ./depots.json;
-  fetchSupported = elem system depotdownloader.meta.platforms;
   fetcher = input:
-    if fetchSupported
-    then
-      fetchSteam {
-        name = "steam-depot-${toString input.app_id}-${toString input.depot_id}";
-        appId = input.app_id;
-        depotId = input.depot_id;
-        manifestId = input.manifest;
-        fileList = input.file_list or [];
-        hash = input.hash;
-      }
-    else
-      stdenvNoCC.mkDerivation {
-        name = "steam-depot-${toString input.app_id}-${toString input.depot_id}-depot";
-        outputHashAlgo = "sha256";
-        outputHashMode = "recursive";
-        outputHash = input.hash;
-        builder = writeScript "restrict-message" ''
-          source ${stdenvNoCC}/setup
-          cat <<_EOF_
-
-          $out
-          fetchSteam is not supported on your platform.
-          You can build srcds for x86_64-linux first to fetch the depot.
-
-          _EOF_
-          exit 1
-        '';
-      };
+    callPackage ./depot.nix {
+      appId = input.app_id;
+      depotId = input.depot_id;
+    };
   manifestUsed = manifest: any (depot: manifest.app_id == depot.app_id && manifest.depot_id == depot.depot_id) depots;
   usedManifests = filter manifestUsed depotInputs;
   allDepots = map fetcher usedManifests;
diff --git a/nix/srcds/depot.nix b/nix/srcds/depot.nix
index 74a1fb6..2ebb473 100644
--- a/nix/srcds/depot.nix
+++ b/nix/srcds/depot.nix
@@ -3,19 +3,39 @@
   fetchSteam,
   appId,
   depotId,
-  hash ? null,
+  system,
+  depotdownloader,
+  stdenvNoCC,
+  writeScript,
 }: let
-  inherit (lib) toString importJSON findFirst;
+  inherit (lib) toString importJSON findFirst elem;
+  fetchSupported = elem system depotdownloader.meta.platforms;
   depotInputs = importJSON ./depots.json;
   depotInput = findFirst (depot: depot.app_id == appId && depot.depot_id == depotId) {} depotInputs;
 in
-  fetchSteam {
-    name = "steam-depot-${toString appId}-${toString depotId}";
-    inherit appId depotId;
-    manifestId = depotInput.manifest;
-    hash =
-      if (hash == null)
-      then depotInput.hash
-      else hash;
-    fileList = depotInput.file_list or [];
-  }
+  if fetchSupported
+  then
+    fetchSteam {
+      name = "steam-depot-${toString appId}-${toString depotId}";
+      inherit appId depotId;
+      manifestId = depotInput.manifest;
+      hash = depotInput.hash;
+      fileList = depotInput.file_list or [];
+    }
+  else
+    stdenvNoCC.mkDerivation {
+      name = "steam-depot-${toString appId}-${toString depotId}-depot";
+      outputHashAlgo = "sha256";
+      outputHashMode = "recursive";
+      outputHash = depotInput.hash;
+      builder = writeScript "restrict-message" ''
+        source ${stdenvNoCC}/setup
+        cat <<_EOF_
+
+        fetchSteam is not supported on your platform.
+        You can build for x86_64-linux first to fetch the depot.
+
+        _EOF_
+        exit 1
+      '';
+    }