diff --git a/pkgs/development/python-modules/cmake/default.nix b/pkgs/development/python-modules/cmake/default.nix
index 9400d4a884a3..c9ee7d11c8fb 100644
--- a/pkgs/development/python-modules/cmake/default.nix
+++ b/pkgs/development/python-modules/cmake/default.nix
@@ -16,6 +16,7 @@ buildPythonPackage rec {
       --subst-var version
 
     substituteInPlace "$sourceRoot/cmake/__init__.py" \
+      --subst-var version \
       --subst-var-by CMAKE_BIN_DIR "${cmake}/bin"
   '';
 
diff --git a/pkgs/development/python-modules/cmake/stub/cmake/__init__.py b/pkgs/development/python-modules/cmake/stub/cmake/__init__.py
index db309957547c..512a13f3d94a 100644
--- a/pkgs/development/python-modules/cmake/stub/cmake/__init__.py
+++ b/pkgs/development/python-modules/cmake/stub/cmake/__init__.py
@@ -2,6 +2,8 @@ import os
 import subprocess
 import sys
 
+__version__ = '@version@'
+
 CMAKE_BIN_DIR = '@CMAKE_BIN_DIR@'
 
 def _program(name, args):