AppVeyor fails installing GHC 7.10.3

[fmaste]

The last 24 hours all AppVeyor test stuck on choco install ghc -version 7.10.3 > NUL finally failing due to timeout (1 hour).
The log with the complete output of this command is:

Build started
git clone -q https://github.com/haskell/cabal.git C:\projects\cabal
git fetch -q origin +refs/pull/3670/merge:
git checkout -qf FETCH_HEAD
Running Install scripts
choco install ghc -version 7.10.3
Parsing -version resulted in exception:
 Cannot bundle unregistered option '-e'.
Installing the following packages:
ghc
By installing you accept licenses for the packages.
ghc v7.10.3 - Possibly broken
The package ghc wants to run 'chocolateyInstall.ps1'.
Note: If you don't run this script, the installation will fail.
Note: To confirm automatically next time, use '-y' or consider setting 
 'allowGlobalConfirmation'. Run 'choco feature -h' for more details.

From chocolatey/choco#842 it looks like it should be --version instead of -version

[ezyang]

Thanks. Besides --version it looks like we need -y

[fmaste]

This is the output running with --version and -y (spoiler alert, still fails but at least we don't have to wait an hour):

Build started
git clone -q https://github.com/haskell/cabal.git C:\projects\cabal
git fetch -q origin +refs/pull/3670/merge:
git checkout -qf FETCH_HEAD
Running Install scripts
choco install -y ghc --version 7.10.3
Installing the following packages:
ghc
By installing you accept licenses for the packages.
ghc v7.10.3 - Possibly broken
Get-BinRoot is going to be deprecated in v1 and removed in v2. It is being replaced with Get-ToolsLocation, however many packages no longer require a special separate directory since package folders no longer have versions on them. Some do though and should continue to use Get-ToolsLocation.
Downloading ghc 64 bit
  from 'http://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-x86_64-unknown-mingw32.tar.xz'
Progress: 99% - Saving 126.11 MB of 127.31 MB (132235740/133494476)
Download of ghc-7.10.3-x86_64-unknown-mingw32.tar.xz (127.31 MB) completed.
Extracting C:\Users\appveyor\AppData\Local\Temp\ghc\7.10.3\ghc-7.10.3-x86_64-unknown-mingw32.tar.xz to C:\ProgramData\chocolatey\lib\ghc\tmp...
C:\ProgramData\chocolatey\lib\ghc\tmp
Extracting C:\ProgramData\chocolatey\lib\ghc\tmp\ghcInstall to C:\tools\ghc...
Microsoft.PowerShell.Commands.WriteErrorException
ERROR: The system cannot find the file specified.
C:\ProgramData\chocolatey\lib\ghc\tmp\ghcInstall
Microsoft.PowerShell.Commands.WriteErrorException
Microsoft.PowerShell.Commands.WriteErrorException
System ERROR:
The system cannot find the file specified.
Microsoft.PowerShell.Commands.WriteErrorException
Cannot find path 'C:\tools\ghc\ghc-7.10.3' because it does not exist.
ERROR: 7-Zip encountered a fatal error while extracting the files
Environment Vars (like PATH) have changed. Close/reopen your shell to
 see the changes (or in powershell/cmd.exe just type `refreshenv`).
The install of ghc was NOT successful.
Error while running 'C:\ProgramData\chocolatey\lib\ghc\tools\chocolateyInstall.ps1'.
 See log for details.
Chocolatey installed 0/1 packages. 1 packages failed.
 See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).
Failures
 - ghc (exited 2) - Error while running 'C:\ProgramData\chocolatey\lib\ghc\tools\chocolateyInstall.ps1'.
 See log for details.
Command exited with code 2

[ezyang]

https://chocolatey.org/packages/ghc/7.10.3 appears to be broken. Let's try bumping up to ghc-8.0.1.

[fmaste]

Changing GHC version to 8.0.1 fails, will try with refreshenv as suggested

Build started
git clone -q https://github.com/haskell/cabal.git C:\projects\cabal
git fetch -q origin +refs/pull/3670/merge:
git checkout -qf FETCH_HEAD
Running Install scripts
choco install -y ghc --version 8.0.1
Installing the following packages:
ghc
By installing you accept licenses for the packages.
cabal v1.24.0.0 [Approved]
 ShimGen has successfully created a shim for cabal.exe
 The install of cabal was successful.
  Software install location not explicitly set, could be in package or 
  default install location if installer.
ghc v8.0.1 [Approved]
Downloading ghc 64 bit
  from 'http://downloads.haskell.org/~ghc/8.0.1/ghc-8.0.1-x86_64-unknown-mingw32.tar.xz'
Progress: 99% - Saving 145.79 MB of 147.77 MB (152870471/154950476)
Download of ghcInstall (147.77 MB) completed.
C:\ProgramData\chocolatey\lib\ghc\tmp\ghcInstall
Extracting C:\ProgramData\chocolatey\lib\ghc\tmp\ghcInstall to C:\ProgramData\chocolatey\lib\ghc\tools...
C:\ProgramData\chocolatey\lib\ghc\tools
Extracting C:\ProgramData\chocolatey\lib\ghc\tools\ghcInstall~ to C:\ProgramData\chocolatey\lib\ghc\tools...
C:\ProgramData\chocolatey\lib\ghc\tools
PATH environment variable does not have C:\ProgramData\chocolatey\lib\ghc\tools\ghc-8.0.1\bin in it. Adding...
Hiding shims for 'C:\ProgramData\chocolatey\lib\ghc\tools'.
Environment Vars (like PATH) have changed. Close/reopen your shell to
 see the changes (or in powershell/cmd.exe just type `refreshenv`).
 The install of ghc was successful.
  Software installed to 'C:\ProgramData\chocolatey\lib\ghc\tools'
Chocolatey installed 2/2 packages. 0 packages failed.
 See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).
SET PATH=%PATH%;C:\tools\ghc\ghc-8.0.1\bin
curl -o cabal.zip --silent https://www.haskell.org/cabal/release/cabal-install-1.24.0.0/cabal-install-1.24.0.0-x86_64-unknown-mingw32.zip
7z x -bd cabal.zip
7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
Scanning the drive for archives:
1 file, 4765486 bytes (4654 KiB)
Extracting archive: cabal.zip
--
Path = cabal.zip
Type = zip
Physical Size = 4765486
Everything is Ok
Size:       21599744
Compressed: 4765486
cabal --version
cabal-install version 1.24.0.0
compiled using version 1.24.0.0 of the Cabal library 
cabal update
Config file path source is default config file.
Config file C:\Users\appveyor\AppData\Roaming\cabal\config not found.
Writing default configuration to
C:\Users\appveyor\AppData\Roaming\cabal\config
Downloading the latest package list from hackage.haskell.org
cd Cabal
ghc --make -threaded -i -i. Setup.hs -Wall -Werror
'ghc' is not recognized as an internal or external command,
operable program or batch file.
Command exited with code 1