Building under Windows Subsystem for Linux

I’m experimenting with Windows Subsystem for Linux. Our slightly old application uses Ember 1.13.1 and we run node 0.12.6. After cloning/installing everything, when I type ember build I get

Build failed. EISDIR, illegal operation on a directory Error: EISDIR, illegal operation on a directory at Error (native) at Object.fs.readSync (fs.js:552:19) at Object.fs.readFileSync (fs.js:389:28) at ConfigReplace.getConfig (/home/rtm/repos/new-connect/node_modules/broccoli-config-replace/index.js:122:21) at ConfigReplace.build (/home/rtm/repos/new-connect/node_modules/broccoli-config-replace/index.js:27:21) at /home/rtm/repos/new-connect/node_modules/broccoli-plugin/read_compat.js:61:34 at tryCatch (/home/rtm/repos/new-connect/node_modules/rsvp/dist/rsvp.js:538:12) at invokeCallback (/home/rtm/repos/new-connect/node_modules/rsvp/dist/rsvp.js:553:13) at publish (/home/rtm/repos/new-connect/node_modules/rsvp/dist/rsvp.js:521:7) at flush (/home/rtm/repos/new-connect/node_modules/rsvp/dist/rsvp.js:2373:5)

This also happens with a brand-new project.

Has anyone else done this? Any ideas?