diff --git a/appveyor.yml b/appveyor.yml
index 0695409..559f53b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -73,7 +73,7 @@ install:
   # compiled extensions and are not provided as pre-built wheel packages,
   # pip will build them from source using the MSVC compiler matching the
   # target Python version and architecture
-  - "%CMD_IN_ENV% pip install tox"
+  - "%CMD_IN_ENV% pip install tox setuptools_scm"
 
 build: false  # Not a C# project, build stuff at the test step instead.