In-repo-addon themes build works on Windows but not on Linux

[ctusch]

Reproduction: https://github.com/ctusch/addon-theme-bug

When I try to build the above project on Linux I get the following error:

Sass Syntax Error (SassCompiler) in /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application//app/styles/themes/addon-theme/app.scss:1:9

Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet


Stack Trace and Error Report: /tmp/error.dump.f6f94bd5e855519474d4ff026a709d1e.log

It works on Windows. I've tried it on several different Linux machines and it always yielded the same error.

I have no idea if it's the SASS compiler, the broccoli-merge-trees plugin or ember-cli itself. It probably has something to do with the symlinks the build process uses. But I can't really check the state since the tmp directory gets cleaned up immediately.

The content of /tmp/error.dump.f6f94bd5e855519474d4ff026a709d1e.log:

=================================================================================

ENV Summary:

  TIME: Wed Mar 20 2019 21:14:00 GMT+0100 (GMT+01:00)
  TITLE: ember
  ARGV:
  - /usr/bin/node
  - /home/ctusch/.config/yarn/global/node_modules/.bin/ember
  - b
  - --verbose
  EXEC_PATH: /usr/bin/node
  TMPDIR: /tmp
  SHELL: /bin/bash
  PATH:
  - /home/ctusch/.config/yarn/global/node_modules/.bin
  - /home/ctusch/bin
  - /home/ctusch/.local/bin
  - /usr/local/sbin
  - /usr/local/bin
  - /usr/sbin
  - /usr/bin
  - /sbin
  - /bin
  PLATFORM: linux x64
  FREEMEM: 4779884544
  TOTALMEM: 17045798912
  UPTIME: 64643
  LOADAVG: 0.5185546875,0.57763671875,0.5859375
  CPUS:
  - Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz - 2594
  - Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz - 2594
  - Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz - 2594
  - Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz - 2594
  ENDIANNESS: LE
  VERSIONS:
  - ares: 1.15.0
  - cldr: 33.1
  - http_parser: 2.8.0
  - icu: 62.1
  - modules: 64
  - napi: 3
  - nghttp2: 1.34.0
  - node: 10.15.3
  - openssl: 1.1.0j
  - tz: 2018e
  - unicode: 11.0
  - uv: 1.23.2
  - v8: 6.8.275.32-node.51
  - zlib: 1.2.11

ERROR Summary:

  - broccoliBuilderErrorStack: Error: Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet
    at Object.BH (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:5229:30)
    at Object.Eh (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:5145:34)
    at wO.$2 (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:15295:20)
    at uP.vq (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:9034:42)
    at uP.vp (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:9036:32)
    at iy.uC (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8384:46)
    at uo.$0 (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8526:7)
    at Object.eG (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:1512:80)
    at ad.ba (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8447:3)
    at iM.ba (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8377:25)
  - code: [undefined]
  - codeFrame: Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet
  - errorMessage: /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application//app/styles/themes/addon-theme/app.scss:1:10: Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet
        at SassCompiler
  - errorType: Sass Syntax Error
  - location:
    - column: 9
    - file: /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application//app/styles/themes/addon-theme/app.scss
    - line: 1
    - treeDir: [undefined]
  - message: /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application//app/styles/themes/addon-theme/app.scss:1:10: Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet
        at SassCompiler
  - name: BuildError
  - nodeAnnotation: [undefined]
  - nodeName: SassCompiler
  - originalErrorMessage: Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet
  - stack: Error: Error: Can't find stylesheet to import.
  ╷
1 │ @import '../../common';
  │         ^^^^^^^^^^^^^^
  ╵
  /tmp/broccoli-11731IvyMcUmIwccy/out-131-broccoli_merge_trees_full_application/app/styles/themes/addon-theme/app.scss 1:9  root stylesheet
    at Object.BH (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:5229:30)
    at Object.Eh (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:5145:34)
    at wO.$2 (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:15295:20)
    at uP.vq (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:9034:42)
    at uP.vp (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:9036:32)
    at iy.uC (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8384:46)
    at uo.$0 (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8526:7)
    at Object.eG (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:1512:80)
    at ad.ba (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8447:3)
    at iM.ba (/mnt/c/tmp/addon-theme-bug/node_modules/sass/sass.dart.js:8377:25)

=================================================================================

---

Output from ember version --verbose && npm --version && yarn --version:

ember-cli: 3.8.1
http_parser: 2.8.0
node: 10.15.3
v8: 6.8.275.32-node.51
uv: 1.23.2
zlib: 1.2.11
ares: 1.15.0
modules: 64
nghttp2: 1.34.0
napi: 3
openssl: 1.1.0j
icu: 62.1
unicode: 11.0
cldr: 33.1
tz: 2018e
os: linux x64
6.4.1
1.15.2