diff --git a/Makefile b/Makefile
index e7cd5990..696eb1e5 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,7 @@ env:
 	virtualenv --python=python3 --system-site-packages env
 	$(IN_ENV) pip install -r requirements.txt
 	ln -sf $(PWD)/prjxray env/lib/python3.*/site-packages/
+	ln -sf $(PWD)/third_party/fasm/fasm.py env/lib/python3.*/site-packages/
 	$(IN_ENV) python -c "import yaml" || (echo "Unable to find python-yaml" && exit 1)
 
 build: