diff --git a/Makefile b/Makefile
index 03bbdc4..7c88f93 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 MAKESELF:=makeself
 LICENSE:=$(shell cat ./license.txt)
 #VERSION:=$(shell cd src && python -c "import msspec; print(msspec.__version__)")
-VERSION:=$(shell git describe|sed 's/-\([[:digit:]]\+\)-.*/post\1/')
+VERSION:=$(shell git describe|sed 's/-\([[:digit:]]\+\)-.*/\.post\1/')
 SETUPFILE:=pymsspec-$(VERSION).setup
 
 .PHONY: clean purge version
@@ -24,6 +24,6 @@ selfex: purge
 	@echo "Creating the self-extractible setup program... "
 	@cp ./src/msspec/version.py ./src/msspec/version.py.bak
 	@echo "__version__ = \"$(VERSION)\"" > ./src/msspec/version.py
-	$(MAKESELF) --license "$(LICENSE)" ./src $(SETUPFILE) "Python MsSpec"  ./install.sh
+	$(MAKESELF) --license ./license.txt --notemp ./src $(SETUPFILE) "Python MsSpec"  ./install.sh
 	@mv ./src/msspec/version.py.bak ./src/msspec/version.py