Fix failing windows test.
Fix failing windows test.

I spent a good while trying to debug this. Got working avoiding
local_checkout but want to fix correctly. However this will unblock
release.

prasaianooz/pip,pjdelport/pip,jythontools/pip,jamezpolley/pip,graingert/pip,davidovich/pip,rouge8/pip,ncoghlan/pip,rbtcollins/pip,RonnyPfannschmidt/pip,esc/pip,fiber-space/pip,msabramo/pip,zorosteven/pip,chaoallsome/pip,Gabriel439/pip,cjerdonek/pip,jythontools/pip,qwcode/pip,minrk/pip,chaoallsome/pip,alquerci/pip,xavfernandez/pip,dstufft/pip,yati-sagade/pip,zorosteven/pip,zvezdan/pip,qbdsoft/pip,ChristopherHogan/pip,RonnyPfannschmidt/pip,tdsmith/pip,zorosteven/pip,supriyantomaftuh/pip,fiber-space/pip,Gabriel439/pip,jythontools/pip,mattrobenolt/pip,ianw/pip,zvezdan/pip,dstufft/pip,prasaianooz/pip,yati-sagade/pip,yati-sagade/pip,luzfcb/pip,James-Firth/pip,graingert/pip,haridsv/pip,sbidoul/pip,tdsmith/pip,atdaemon/pip,haridsv/pip,fiber-space/pip,habnabit/pip,benesch/pip,sigmavirus24/pip,prasaianooz/pip,alquerci/pip,techtonik/pip,mindw/pip,xavfernandez/pip,rbtcollins/pip,dstufft/pip,mindw/pip,habnabit/pip,mujiansu/pip,habnabit/pip,harrisonfeng/pip,luzfcb/pip,atdaemon/pip,zenlambda/pip,wkeyword/pip,RonnyPfannschmidt/pip,luzfcb/pip,jmagnusson/pip,blarghmatey/pip,ianw/pip,pypa/pip,natefoo/pip,h4ck3rm1k3/pip,techtonik/pip,zenlambda/pip,sigmavirus24/pip,minrk/pip,mindw/pip,zenlambda/pip,chaoallsome/pip,alex/pip,willingc/pip,willingc/pip,rouge8/pip,patricklaw/pip,erikrose/pip,nthall/pip,davidovich/pip,pradyunsg/pip,willingc/pip,jmagnusson/pip,KarelJakubec/pip,nthall/pip,graingert/pip,nthall/pip,msabramo/pip,supriyantomaftuh/pip,patricklaw/pip,esc/pip,jamezpolley/pip,sigmavirus24/pip,ncoghlan/pip,techtonik/pip,wkeyword/pip,Ivoz/pip,squidsoup/pip,pjdelport/pip,zvezdan/pip,rbtcollins/pip,alex/pip,James-Firth/pip,Gabriel439/pip,ChristopherHogan/pip,pjdelport/pip,jasonkying/pip,qbdsoft/pip,atdaemon/pip,cjerdonek/pip,h4ck3rm1k3/pip,erikrose/pip,supriyantomaftuh/pip,caosmo/pip,KarelJakubec/pip,ChristopherHogan/pip,caosmo/pip,benesch/pip,natefoo/pip,jasonkying/pip,erikrose/pip,harrisonfeng/pip,mujiansu/pip,squidsoup/pip,radiosilence/pip,davidovich/pip,rouge8/pip,jasonkying/pip,esc/pip,qwcode/pip,mattrobenolt/pip,natefoo/pip,sbidoul/pip,caosmo/pip,pfmoore/pip,wkeyword/pip,James-Firth/pip,blarghmatey/pip,squidsoup/pip,Ivoz/pip,mujiansu/pip,jamezpolley/pip,pfmoore/pip,h4ck3rm1k3/pip,ncoghlan/pip,tdsmith/pip,blarghmatey/pip,qbdsoft/pip,alex/pip,haridsv/pip,pypa/pip,xavfernandez/pip,KarelJakubec/pip,harrisonfeng/pip,Carreau/pip,jmagnusson/pip,benesch/pip,Carreau/pip,pradyunsg/pip