diff --git a/.github/workflows/update_deps.yaml b/.github/workflows/update_deps.yaml
index 3e3f735..6777ddd 100644
--- a/.github/workflows/update_deps.yaml
+++ b/.github/workflows/update_deps.yaml
@@ -29,7 +29,7 @@ jobs:
             git reset --soft HEAD^
           fi
 
-          if NPINS=$(nix run nixpkgs#npins -- -d ./pkgs update -f | grep -E '[^\(no changes\)]*url.*'); then
+          if NPINS=$(nix run nixpkgs#npins -- -d ./pkgs/npins update -f | grep -E '[^\(no changes\)]*url.*'); then
             MESSAGE="$MESSAGE
 
           npins url updates:
diff --git a/module.nix b/module.nix
index 6fc1bd7..eaa6b9a 100644
--- a/module.nix
+++ b/module.nix
@@ -13,6 +13,7 @@ let
   spicePkgs = self.legacyPackages.${pkgs.stdenv.hostPlatform.system};
   extensionType = lib.types.either lib.types.pathInStore (
     lib.types.submodule {
+      freeformType = lib.types.attrs;
       options = {
         src = lib.mkOption {
           type = lib.types.pathInStore;
@@ -48,6 +49,7 @@ in
       inherit (spicePkgs.themes) default;
 
       type = lib.types.submodule {
+        freeformType = lib.types.attrs;
         options = {
           name = lib.mkOption {
             type = lib.types.str;
@@ -171,6 +173,7 @@ in
     enabledCustomApps = lib.mkOption {
       type = lib.types.listOf (
         lib.types.submodule {
+          freeformType = lib.types.attrs;
           options = {
             src = lib.mkOption {
               type = lib.types.pathInStore;
diff --git a/pkgs/default.nix b/pkgs/default.nix
index e5f661c..a1e7bf0 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -4,7 +4,7 @@ let
   spicePkgs = self.legacyPackages.${pkgs.stdenv.system};
 in
 {
-  sources = lib.mapAttrs (_: pkgs.npins.mkSource) (lib.importJSON "${self}/pkgs/sources.json").pins;
+  sources = pkgs.callPackages "${self}/pkgs/npins/sources.nix" { };
   spicetify = pkgs.callPackage "${self}/pkgs/spicetify.nix" { };
 
   /*
diff --git a/pkgs/sources.json b/pkgs/npins/sources.json
similarity index 100%
rename from pkgs/sources.json
rename to pkgs/npins/sources.json
diff --git a/pkgs/npins/sources.nix b/pkgs/npins/sources.nix
new file mode 100644
index 0000000..2385c6c
--- /dev/null
+++ b/pkgs/npins/sources.nix
@@ -0,0 +1,72 @@
+# Based off of:
+# https://github.com/NixOS/nixpkgs/blob/776c3bee4769c616479393aeefceefeda16b6fcb/pkgs/tools/nix/npins/source.nix
+{
+  lib,
+  fetchurl,
+  fetchgit,
+  fetchzip,
+}:
+builtins.mapAttrs (
+  _:
+  let
+    getZip =
+      { url, hash, ... }:
+      fetchzip {
+        inherit url;
+        sha256 = hash;
+        extension = "tar";
+
+      };
+    mkGitSource =
+      {
+        repository,
+        revision,
+        url ? null,
+        hash,
+        ...
+      }@attrs:
+      assert repository ? type;
+      if url != null then
+        getZip attrs
+      else
+        assert repository.type == "Git";
+        let
+          urlToName =
+            url: rev:
+            let
+              matched = builtins.match "^.*/([^/]*)(\\.git)?$" repository.url;
+              short = builtins.substring 0 7 rev;
+              appendShort = if (builtins.match "[a-f0-9]*" rev) != null then "-${short}" else "";
+            in
+            "${if matched == null then "source" else builtins.head matched}${appendShort}";
+          name = urlToName repository.url revision;
+        in
+        fetchgit {
+          inherit name;
+          inherit (repository) url;
+          rev = revision;
+          sha256 = hash;
+        };
+
+    mkPyPiSource =
+      { url, hash, ... }:
+      fetchurl {
+        inherit url;
+        sha256 = hash;
+      };
+  in
+  spec:
+  assert spec ? type;
+  let
+    func =
+      {
+        Git = mkGitSource;
+        GitRelease = mkGitSource;
+        PyPi = mkPyPiSource;
+        Channel = getZip;
+      }
+      .${spec.type} or (builtins.throw "Unknown source type ${spec.type}");
+  in
+  spec // { outPath = func spec; }
+
+) (lib.importJSON ./sources.json).pins