Jenkinsfile: Wrap it all in a withEnv block instead.

Jenkinsfile

@@ -6,18 +6,19 @@ node {
          env.VERSION_STRING = GIT_TAG
      }
      docker.image('golang:1.8').inside {
-         stage 'test'
-         sh 'export HOME=\$PWD'
-         sh 'env'
-         sh 'curl https://glide.sh/get | sh'
-         sh 'git config --global user.name "jenkins"'
-         sh 'git config --global user.email "jenkins@localhost"'
-         sh 'glide --debug install'
-         sh 'make test'
+         withEnv(["HOME=${env.WORKSPACE}"]) {
+             stage 'test'
+             sh 'env'
+             sh 'curl https://glide.sh/get | sh'
+             sh 'git config --global user.name "jenkins"'
+             sh 'git config --global user.email "jenkins@localhost"'
+             sh 'glide --debug install'
+             sh 'make test'
 
-         stage 'build'
-         sh 'make build'
-         stash includes: 'dist/linux-amd64/jwt-tokenissuer', name: 'binary'
+             stage 'build'
+             sh 'make build'
+             stash includes: 'dist/linux-amd64/jwt-tokenissuer', name: 'binary'
+         }
      }
      docker.image('cdrx/fpm-debian:8').inside {
          stage 'package'