Anyone understand what's going on here (HEAD) on Windows?
```
2019-09-14T19:06:40.1438283Z # Running: git clone
https://gitlab.haskell.org/ghc/ghc.git2019-09-14T19:06:40.1879263Z Cloning into 'ghc'...
2019-09-14T19:07:02.4403717Z error: unable to stat just-written file compiler/GHC/StgToCmm/Con.hs: No such file or directory
```