diff --git a/pkgs/development/python-modules/blockdiag/default.nix b/pkgs/development/python-modules/blockdiag/default.nix
index 5859e00c6cd80..149d30c1dda6b 100644
--- a/pkgs/development/python-modules/blockdiag/default.nix
+++ b/pkgs/development/python-modules/blockdiag/default.nix
@@ -58,6 +58,7 @@ buildPythonPackage rec {
     funcparserlib
     pillow
     reportlab
+    setuptools
     webcolors
   ];