diff --git a/pkgs/tools/backup/gphotos-sync/default.nix b/pkgs/tools/backup/gphotos-sync/default.nix
index 5315ee572353..707828fae713 100644
--- a/pkgs/tools/backup/gphotos-sync/default.nix
+++ b/pkgs/tools/backup/gphotos-sync/default.nix
@@ -8,7 +8,7 @@ python3.pkgs.buildPythonApplication rec {
   version = "3.1.2";
   format = "pyproject";
 
-  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+  env.SETUPTOOLS_SCM_PRETEND_VERSION = version;
 
   src = fetchFromGitHub {
     owner = "gilesknap";
@@ -22,9 +22,11 @@ python3.pkgs.buildPythonApplication rec {
   ];
 
   nativeBuildInputs = [ python3.pkgs.pythonRelaxDepsHook ];
+
   pythonRelaxDeps = [
     "psutil"
     "exif"
+    "pyyaml"
   ];
 
   propagatedBuildInputs = with python3.pkgs; [