diff --git a/Makefile b/Makefile
index a086e41..9c04f99 100644
--- a/Makefile
+++ b/Makefile
@@ -74,7 +74,7 @@ help:
 DEV_INSTALL := $(CONDA_RUN) pip install -e . --no-deps --no-build-isolation
 
 createdev:
-	conda env create -f environment.yml -n $(DEV_ENV)
+	conda env create -f environment.yml -n $(DEV_ENV) --yes
 	$(MAKE) dev-install
 
 updatedev:
diff --git a/test-projects/setup/setup.py b/test-projects/setup/setup.py
index 190b88e..fac3980 100644
--- a/test-projects/setup/setup.py
+++ b/test-projects/setup/setup.py
@@ -37,7 +37,9 @@
     install_requires = [
         "tables",
         "wheel",
-        "black; extra == 'dev'",
     ],
+    extras_require = {
+        'bdev': [ 'black' ]
+    },
     packages=["mypkg"]
 )
\ No newline at end of file