diff --git a/default.nix b/default.nix
index c1fbe40..c7c1f52 100644
--- a/default.nix
+++ b/default.nix
@@ -5,7 +5,7 @@
   buildPythonPackage,
 
   # build-system
-  setuptools_scm,
+  setuptools-scm,
 
   # dependencies
   pydantic,
@@ -17,7 +17,7 @@ let
 in buildPythonPackage rec {
   inherit pname version;
   pyproject = true;
-  build-system = [ setuptools_scm ];
+  build-system = [ setuptools-scm ];
   src = ./.;
 
   propagatedBuildInputs = [
diff --git a/pypi.nix b/pypi.nix
index 9fdf5e6..f0bd90f 100644
--- a/pypi.nix
+++ b/pypi.nix
@@ -5,10 +5,14 @@
 
   buildPythonPackage,
 
+  setuptools-scm,
+
   fetchPypi,
 }:
 buildPythonPackage rec {
   inherit pname version;
+  pyproject = true;
+  build-system = [ setuptools-scm ];
   src = fetchPypi {
     inherit pname version sha256;
   };