diff --git a/Makefile b/Makefile
index 4950075e..7044be64 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 NPM_PREFIX=$(realpath .)/node_modules
-PATH:=${NPM_PREFIX}/.bin:${PATH}
-SHELL:=env PATH="${PATH}" /bin/sh
+PATH:="${NPM_PREFIX}/.bin:${PATH}"
+SHELL:=env PATH=${PATH} /bin/sh
 
 .PHONY: test
 test: elm-stuff tests/elm-stuff node_modules