Try symlinking into gopkg.in/urfave/cli.v2 better

.travis.yml

@@ -25,7 +25,7 @@ matrix:
     env: pip_install="sudo pip install"
   - go: 1.1.2
     install: go get -v .
-    before_script: echo skipping gfmxr on $TRAVIS_GO_VERSION
+    before_script: echo skipping gfmxr on ${TRAVIS_GO_VERSION}
     script:
     - ./runtests vet
     - ./runtests test
@@ -36,9 +36,9 @@ before_script:
 - if [ ! -f node_modules/.bin/markdown-toc ] ; then
     npm install markdown-toc ;
   fi
-- mkdir -p ~/gopath/src/gopkg.in/urfave
-- rm -rf ~/gopath/src/gopkg.in/urfave/cli.v2
-- ln -sv ~/gopath/src/github.com/urfave/cli ~/gopath/src/gopkg.in/urfave/cli.v2
+- mkdir -p ${GOPATH%%:*}/src/gopkg.in/urfave
+- rm -rf ${GOPATH%%:*}/src/gopkg.in/urfave/cli.v2
+- ln -sv ${TRAVIS_BUILD_DIR} ${GOPATH%%:*}/src/gopkg.in/urfave/cli.v2
 
 script:
 - flake8 runtests cli-v1-to-v2