diff --git a/setuptools_scm/stub.py b/setuptools_scm/stub.py
index 01775f9..abfe75e 100644
--- a/setuptools_scm/stub.py
+++ b/setuptools_scm/stub.py
@@ -10,4 +10,4 @@ if TYPE_CHECKING:
 
 
 def set_version(dist: setuptools.Distribution) -> None:
-    dist.metadata.version = os.getenv("SETUPTOOLS_SCM_PRETEND_VERSION")
+    dist.metadata.version = os.environ["SETUPTOOLS_SCM_PRETEND_VERSION"]