diff --git a/Makefile.envs b/Makefile.envs
index 6b4820c30..a202961d9 100644
--- a/Makefile.envs
+++ b/Makefile.envs
@@ -1,6 +1,6 @@
 export EMSCRIPTEN_VERSION = 1.38.30
 
-export PATH := $(PYODIDE_ROOT)/ccache:$(PYODIDE_ROOT)/emsdk/emsdk:$(PYODIDE_ROOT)/emsdk/emsdk/clang/tag-e$(EMSCRIPTEN_VERSION)/build_tag-e$(EMSCRIPTEN_VERSION)_64/bin:$(PYODIDE_ROOT)/emsdk/emsdk/node/8.9.1_64bit/bin:$(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-$(EMSCRIPTEN_VERSION):$(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-$(EMSCRIPTEN_VERSION)_64bit_binaryen/bin:$(PATH)
+export PATH := "$(PYODIDE_ROOT)/ccache:$(PYODIDE_ROOT)/emsdk/emsdk:$(PYODIDE_ROOT)/emsdk/emsdk/clang/tag-e$(EMSCRIPTEN_VERSION)/build_tag-e$(EMSCRIPTEN_VERSION)_64/bin:$(PYODIDE_ROOT)/emsdk/emsdk/node/8.9.1_64bit/bin:$(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-$(EMSCRIPTEN_VERSION):$(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-$(EMSCRIPTEN_VERSION)_64bit_binaryen/bin:$(PATH)"
 
 export EMSDK = $(PYODIDE_ROOT)/emsdk/emsdk
 export EM_CONFIG = $(PYODIDE_ROOT)/emsdk/emsdk/.emscripten