diff --git a/Dockerfile b/Dockerfile
index 505d8159..d10d260b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -284,12 +284,11 @@ RUN cd ~ && touch .chktexrc
 #################
 # Install shfmt #
 #################
-ENV GO111MODULE=on
+ENV GO111MODULE=on \
+    GOROOT=/usr/lib/go \
+    GOPATH=/go
 
-ENV GOROOT=/usr/lib/go \
-    GOPATH=/go \
-    PATH="$PATH":"$GOROOT"/bin \
-    PATH="$PATH":"$GOPATH"/bin
+ENV PATH="$PATH":"$GOROOT"/bin:"$GOPATH"/bin
 
 RUN mkdir -p ${GOPATH}/src ${GOPATH}/bin
 RUN go get mvdan.cc/sh/v3/cmd/shfmt