diff --git a/Makefile b/Makefile
index 31ae18770985a4105792a918a0d1a8084ca209d0..7bc4147d1fbd79590b62d4c51a646413120e9229 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,8 @@
 PYCMD=python3
 CC=mpicxx
 NVCC=nvcc
-NVCC_PATH = "$(shell which ${NVCC})"
-CUDA_BIN_PATH = "$(shell dirname ${NVCC_PATH})"
+NVCC_PATH:="$(shell which ${NVCC})"
+CUDA_BIN_PATH:="$(shell dirname ${NVCC_PATH})"
 CUDA_PATH:="$(shell dirname ${CUDA_BIN_PATH})"
 
 all: clean build lj_cpu lj_gpu