diff --git a/third_party/nix/sources.json b/third_party/nix/sources.json
new file mode 100644
index 0000000..0e9dd95
--- /dev/null
+++ b/third_party/nix/sources.json
@@ -0,0 +1,14 @@
+{
+    "nixpkgs": {
+        "branch": "release-23.05",
+        "description": "Nix Packages collection",
+        "homepage": null,
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b9fc1843e64c11665ef440d02ecb6b3980a62756",
+        "sha256": "0krzc81cn1vfblhljw9wgx1wkfwlifh9dy3z3c64yhkh3xy6pfji",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/b9fc1843e64c11665ef440d02ecb6b3980a62756.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}