Downloads of v 9.0.1-rc1:


Last Update:

03 Jan 2021

Package Maintainer(s):

Software Author(s):

  • GHC Team


ghc haskell


This is a prerelease version of GHC.

9.0.1-rc1 | Updated: 03 Jan 2021



Downloads of v 9.0.1-rc1:



Software Author(s):

  • GHC Team


ghc haskell

GHC 9.0.1-rc1

This is a prerelease version of GHC.

Some Checks Have Failed or Are Not Yet Complete

1 Test Failing and 1 Pending Test

Validation Testing Failed

Verification Testing Pending

To install GHC, run the following command from the command line or from PowerShell:


To upgrade GHC, run the following command from the command line or from PowerShell:


To uninstall GHC, run the following command from the command line or from PowerShell:


NOTE: This applies to both open source and commercial editions of Chocolatey.

1. Ensure you are set for organizational deployment

Please see the organizational deployment guide

  • Open Source or Commercial:
    • Proxy Repository - Create a proxy nuget repository on Nexus, Artifactory Pro, or a proxy Chocolatey repository on ProGet. Point your upstream to Packages cache on first access automatically. Make sure your choco clients are using your proxy repository as a source and NOT the default community repository. See source command for more information.
    • You can also just download the package and push it to a repository Download

3. Enter your internal repository url

(this should look similar to

4. Choose your deployment method:

choco upgrade ghc -y --source="'STEP 3 URL'" [other options]

See options you can pass to upgrade.

See best practices for scripting.

Add this to a PowerShell script or use a Batch script with tools and in places where you are calling directly to Chocolatey. If you are integrating, keep in mind enhanced exit codes.

If you do use a PowerShell script, use the following to ensure bad exit codes are shown as failures:

choco upgrade ghc -y --source="'STEP 3 URL'"

Write-Verbose "Exit code was $exitCode"
$validExitCodes = @(0, 1605, 1614, 1641, 3010)
if ($validExitCodes -contains $exitCode) {
  Exit 0

Exit $exitCode

- name: Ensure ghc installed
    name: ghc
    state: present
    version: 9.0.1-rc1
    source: STEP 3 URL

See docs at

Coming early 2020! Central Managment Reporting available now! More information...

chocolatey_package 'ghc' do
  action    :install
  version  '9.0.1-rc1'
  source   'STEP 3 URL'

See docs at

    Name: ghc,
    Version: 9.0.1-rc1,
    Source: STEP 3 URL

Requires Otter Chocolatey Extension. See docs at

cChocoPackageInstaller ghc
   Name     = 'ghc'
   Ensure   = 'Present'
   Version  = '9.0.1-rc1'
   Source   = 'STEP 3 URL'

Requires cChoco DSC Resource. See docs at

package { 'ghc':
  provider => 'chocolatey',
  ensure   => '9.0.1-rc1',
  source   => 'STEP 3 URL',

Requires Puppet Chocolatey Provider module. See docs at

salt '*' chocolatey.install ghc version="9.0.1-rc1" source="STEP 3 URL"

See docs at

5. If applicable - Chocolatey configuration/installation

See infrastructure management matrix for Chocolatey configuration elements and examples.

This package is exempt from moderation. While it is likely safe for you, there is more risk involved.

• GHC supports the entire Haskell 2010 language plus a wide variety of extensions.
• GHC has particularly good support for concurrency and parallelism, including support for Software Transactional Memory (STM).
• GHC generates fast code, particularly for concurrent programs. Take a look at GHC's performance on The Computer Language Benchmarks Game.
• GHC works on several platforms including Windows, Mac, Linux, most varieties of Unix, and several different processor architectures. There are detailed instructions for porting GHC to a new platform.
• GHC has extensive optimisation capabilities, including inter-module optimisation.
• GHC compiles Haskell code either directly to native code or using LLVM as a back-end. GHC can also generate C code as an intermediate target for porting to new platforms. The interactive environment compiles Haskell to bytecode, and supports execution of mixed bytecode/compiled programs.
• Profiling is supported, both by time/allocation and various kinds of heap profiling.
• GHC comes with several libraries, and thousands more are available on Hackage.

There's an important change to path handling for Windows starting with 8.6.1.
These changes mean that Haskell programs are no longer constraint to MAX_PATH. So passing a long path to openFile will just work.
There are a few caveats to this such as you can't access COM devices via COM1 etc anymore and instead need to use the full path \\.\COM1 etc.
This is all documented

32-bit Windows is no longer supported and installing this package on 32-bit Windows will install GHC 8.6.5.

GHC 9.0 contains a new I/O manager for Windows as a technical preview. See changelog for more information.

Package Specific


  • Adds support for Azure Pipelines.

Package Parameters

The following package parameters can be set:

  • /installdir: - The location to install package to. Note that installing to a directory with spaces will likely lead to difficulties.
  • /globalinstall: - Indicates whether package should be installed for current user or all users.
  • /integer-simple: - Install the integer-simple version of GHC.

To pass parameters, use --params "''" (e.g. choco install packageID [other options] --params="'/ITEM:value /ITEM2:value2 /FLAG_BOOLEAN'").
To have choco remember parameters on upgrade, be sure to set choco feature enable -n=useRememberedArgumentsForUpgrades.

$version     = ''
$packageName = 'ghc'
$url         = ''
$binSha256   = '10d5f16f3f611f23f928ac33bd8b9362476f38367560f73835877b2acec4f509'
$variant     = ''
$pp          = Get-PackageParameters
if ($pp['integer-simple']) {
  $variant = '-integer-simple'
  $binSha256 = 'b38d767cab949ee810b44f6a0dfec50bc07b88374393106c3ec4a010e695f064'
$baseTarget  = 'ghc-' + $version + '-x86_64-unknown-mingw32'
$target      = $baseTarget + $variant
$url64       = '' + $target + '.tar.xz'
$is32 = (Get-OSArchitectureWidth 32)  -or $env:chocolateyForceX86 -eq 'true'

      Write-Host "#     # ####### ####### ###  #####  #######"
      Write-Host "##    # #     #    #     #  #     # #      "
      Write-Host "# #   # #     #    #     #  #       #      "
      Write-Host "#  #  # #     #    #     #  #       #####  "
      Write-Host "#   # # #     #    #     #  #       #      "
      Write-Host "#    ## #     #    #     #  #     # #      "
      Write-Host "#     # #######    #    ###  #####  #######"
      Write-Host ""
      Write-Host " 32 bit binary for Windows is no longer supported."
      Write-Host "GHC 8.6.5 will be installed instead."
      Write-Host ""
      # rewrite the version to 8.6.5 so installer works
      $version = '8.6.5'

# Fixes issue #4
if ($pp['installdir']) {
  $binRoot         = $pp['installdir']
} else {
  $binRoot         = $(Split-Path -parent $MyInvocation.MyCommand.Definition)
$packageFullName = Join-Path $binRoot ($packageName + '-' + $version)
$binPackageDir   = Join-Path $packageFullName "bin"

$tmpPath = Join-Path $env:chocolateyPackageFolder tmp
$tarFile = $packageName + "Install"
$tarPath = Join-Path $tmpPath $tarFile
$tmpFile = Join-Path $binRoot ($tarFile + "~")

Get-ChocolateyWebFile -PackageName $packageName -FileFullPath $tarPath `
    -Url $url -ChecksumType sha256 -Checksum 2a8fb73080ed4335f7a172fe6cf9da1a2faa51fdb72817c50088292f497fc57a `
    -Url64bit $url64 -ChecksumType64 sha256 -Checksum64 $binSha256
Get-ChocolateyUnzip -fileFullPath $tarPath -destination $binRoot
Get-ChocolateyUnzip -fileFullPath $tmpFile -destination $binRoot
rm $tmpFile # Clean up temporary file

# new folders are stupidly long and verbose and break convention.
# let's normalize them
$longBinPackageDir = Join-Path $binRoot $baseTarget
if (Test-Path $longBinPackageDir) {
    Rename-Item -fo $longBinPackageDir $packageFullName

# FIxes issue #8
$installScope = 'User'
if ($pp['globalinstall'] -eq 'true') {
  $installScope = 'Machine'
  Write-Host "Install scope set to global."
Install-ChocolateyPath "$binPackageDir" -Machine "$installScope"

Write-Host "Hiding shims for `'$binRoot`'."
$files = get-childitem $binRoot -include *.exe -recurse

foreach ($file in $files) {
    #generate an ignore file
    New-Item "$file.ignore" -type file -force | Out-Null

# Detect Github Actions
if (($null -ne $Env:GITHUB_ACTIONS) -and ("" -ne $Env:GITHUB_ACTIONS)) {
  echo "$binPackageDir" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append

# Detect Azure Pipelines (Fixes issue #9)
if (($null -ne $Env:TF_BUILD) -and ("" -ne $Env:TF_BUILD)) {
  Write-Host "##vso[task.prependpath]$binPackageDir"

if (($null -ne $Env:TRAVIS) -and ("" -ne $Env:TRAVIS)) {
  Write-Host "Configuring Travis aliases."
  # We need to fix up refreshenv for Travis
  $rc = $Env:HOME + "/.bashrc"

  Add-Content $rc "function refreshenv
  powershell -NonInteractive - <<\EOF
Import-Module -Force `"`$env:ChocolateyInstall\helpers\chocolateyProfile.psm1`"
`$pref = `$ErrorActionPreference
`$ErrorActionPreference = 'SilentlyContinue'
`$ErrorActionPreference = `$pref
# Round brackets in variable names cause problems with bash
Get-ChildItem env:* | %{
  if (!(`$_.Name.Contains('('))) {
    `$value = `$_.Value
    if (`$_.Name -eq 'PATH') {
      `$value = `$value -replace ';',':'
    Write-Output (`"export `" + `$_.Name + `"='`" + `$value + `"'`")
} | Out-File -Encoding ascii $env:TEMP\

  source `"$env:TEMP/`"

alias RefreshEnv=refreshenv"

  Write-Host "Ok, updated ~/.bashrc, source to use refreshenv."

No results available for this package. We are building up results for older packages over time so expect to see results. If this is a new package, it should have results within a day or two.

Version Downloads Last Updated Status
GHC 9.0.1-rc1 42 Sunday, January 3, 2021 Exempted
GHC 9.0.1-alpha1 196 Saturday, October 10, 2020 Exempted
GHC 7151 Sunday, November 15, 2020 Approved
GHC 8029 Monday, October 12, 2020 Approved
GHC 8.10.2 21758 Sunday, August 9, 2020 Approved
GHC 512 Sunday, November 15, 2020 Approved
GHC 8.10.1 21030 Tuesday, March 24, 2020 Approved
GHC 8.10.1-alpha1 98 Wednesday, November 27, 2019 Approved
GHC 999 Sunday, November 15, 2020 Approved

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  • Tell us what you love about the package or GHC, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
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