haskell/cabal

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Official upstream development repository for Cabal and cabal-install

Stars: 1.7k
Forks: 751
Open beginner issues: 0
Indexed issues: 1.8k
Avg merge: 4d 3h
Merged PRs (30d): 28

Dominant language: Haskell
License: No license data
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue hacktoberfest

Beginner friendly Everything

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1,821 open issues indexed

Need help porting `Custom` build script to `Hooks` build script Open

type: user-question

Difficulty 5/5 Over a week Newbie friendliness 30/100

haskell/cabal#12344 · 3 comments · Opened Sep 10, 2026
Cabal does not use the C toolchain GHC was configured with Open

needs triage type: bug

haskell/cabal#12332 · 1 assignee · Opened Sep 8, 2026
Usefulness of releasing `cabal-install` the library Open

type: discussion type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

haskell/cabal#12326 · 3 comments · Opened Sep 6, 2026
cabal 3.18.1.0 effectively dropped semaphore support Open

blocked: upstream type: bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

haskell/cabal#12306 · 3 comments · Opened Aug 31, 2026
cabal-install should try to minimise the critical path when compiling a build graph concurrently Open

cabal-install: cmd/build type: enhancement type: performance

Difficulty 5/5 Over a week Newbie friendliness 45/100

haskell/cabal#12305 · 3 reactions · Opened Aug 31, 2026
Release checklist for `3.18.2.0` (minor release) Open

release

Difficulty 5/5 Over a week Newbie friendliness 20/100

haskell/cabal#12295 · 15 comments · 3 reactions · Opened Aug 28, 2026
Adding a javascript target to check compatibility. Open

attention: pr-welcome type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

haskell/cabal#12293 · 1 reaction · Opened Aug 28, 2026
Package Description Format Specification History doesn't mention Make changes Open

type: bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

haskell/cabal#12292 · Opened Aug 27, 2026
Somewhere between 3.16 and 3.18 parseConditionConfVar got a new argument. I cannot find a changelog entry for it. Open

API change documentation

Difficulty 3/5 1-2 days Newbie friendliness 58/100

haskell/cabal#12286 · 4 comments · 1 reaction · Opened Aug 26, 2026
path for hcp coverage report Open

attention: pr-welcome type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

haskell/cabal#12285 · 1 comment · 1 reaction · Opened Aug 26, 2026
cabalSpecLatest remains 3.16 in cabal-install 3.18.1.0, causing cabal-version: 3.18 Simple packages to fail Open

attention: needs-backport 3.18 attention: pr-welcome regression in 3.18 type: bug

Difficulty 4/5 3-5 days Newbie friendliness 68/100

haskell/cabal#12271 · 4 comments · 1 reaction · Opened Aug 24, 2026
Question: Behaviour of `cabal install` vs `cabal build`? (Placement of build artefacts) Open

type: user-question

Difficulty 3/5 1-2 days Newbie friendliness 35/100

haskell/cabal#12270 · Opened Aug 24, 2026
On windows cabal-install can't `cabal install` cabal-install. Open

can-workaround needs triage platform: windows type: bug

Difficulty 4/5 3-5 days Newbie friendliness 50/100

haskell/cabal#12269 · 7 comments · 1 reaction · Opened Aug 24, 2026
Bad error message on cabal run with multiple executable Open

attention: pr-welcome re: error-message type: enhancement

haskell/cabal#12262 · 1 comment · 1 assignee · Opened Aug 23, 2026
documentation: True runs Haddock for inferred multi-repl targets Open

attention: pr-welcome cabal-install: cmd/repl type: bug

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

haskell/cabal#12242 · 5 comments · 1 reaction · Opened Aug 17, 2026
update bootstrap scripts for the 3.18.1.0 release Open

cabal-install: bootstrap release type: enhancement

haskell/cabal#12233 · 1 assignee · Opened Aug 15, 2026
`cabal run` stopped recognizing target name after `--` with cabal-install 3.18.1.0 Open

cabal-install: cmd/run documentation regression in 3.18

Difficulty 4/5 3-5 days Newbie friendliness 45/100

haskell/cabal#12231 · 26 comments · 2 reactions · Opened Aug 14, 2026
Deprecate legacy --prefer-oldest CLI flag Open

type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 38/100

haskell/cabal#12217 · 1 comment · 1 reaction · Opened Aug 7, 2026
Quoted component names containing spaces are impossible to refer to Open

re: internal library type: bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

haskell/cabal#12207 · 7 comments · Opened Aug 3, 2026
cabal-3.18.1.0 with older lib:Cabal custom setup package crashes HLS Open

can-workaround type: bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

haskell/cabal#12186 · 2 reactions · Opened Jul 30, 2026
Show default when flags toggle feature Open

documentation type: discussion type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 64/100

haskell/cabal#12180 · 3 comments · 1 reaction · Opened Jul 29, 2026
Unrecognized Cabal flag error is printed to stdout Open

re: error-message type: bug

Difficulty 3/5 1-2 days Newbie friendliness 64/100

haskell/cabal#12178 · 1 comment · 1 reaction · Opened Jul 29, 2026
Cannot parse the glob syntax for packages Open

type: bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

haskell/cabal#12171 · Opened Jul 28, 2026
Ambiguous module name in multiple packages message not clear Open

type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

haskell/cabal#12155 · 3 comments · Opened Jul 24, 2026
Dogfood run unable to download artifact Open

type: bug

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

haskell/cabal#12154 · 1 comment · Opened Jul 24, 2026
Do we still need bash completion for `new-*` commands? Open

attention: pr-welcome type: user-question

Difficulty 3/5 1-2 days Newbie friendliness 48/100

haskell/cabal#12151 · 2 comments · Opened Jul 23, 2026
Use the plural for some command line variants Open

attention: pr-welcome documentation

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

haskell/cabal#12144 · 1 reaction · Opened Jul 22, 2026
Parsec project parser can't parse debug-info boolean Open

attention: pr-welcome type: bug

haskell/cabal#12140 · 2 comments · 1 assignee · Opened Jul 22, 2026
Remove the legacy project parser Open

attention: pr-welcome

haskell/cabal#12138 · 3 reactions · 1 assignee · Opened Jul 22, 2026
Relocatable build tree Open

attention: pr-welcome type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

haskell/cabal#12137 · 7 comments · 11 reactions · Opened Jul 21, 2026
Repl started with --enable-multi-repl **and** _without_ passing the name of an executable in a project with the unnamed library stanza, inherits a different PATH than otherwise Open

type: bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

haskell/cabal#12122 · 1 comment · 1 reaction · Opened Jul 16, 2026
Turn cabal-install into a build graph orchestrator Open

cabal-install: cmd/build type: discussion type: enhancement type: performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

haskell/cabal#12121 · 1 comment · 7 reactions · Opened Jul 16, 2026
Introduce build profiles Open

attention: pr-welcome cabal-install: cmd/build recompilation type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

haskell/cabal#12120 · 14 reactions · Opened Jul 16, 2026
Don't re-run the solver unnecessarily Open

attention: pr-welcome cabal-install: cmd/build recompilation type: bug type: discussion type: performance

Difficulty 4/5 3-5 days Newbie friendliness 45/100

haskell/cabal#12119 · 2 comments · 2 reactions · Opened Jul 16, 2026
Improve observability of recompilation checking Open

attention: pr-welcome cabal-install: cmd/build recompilation type: enhancement type: performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

haskell/cabal#12118 · 3 reactions · Opened Jul 16, 2026
Provide a `--report` flag that gives a complete report of build times Open

attention: pr-welcome cabal-install: cmd/build type: enhancement type: performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

haskell/cabal#12117 · 1 comment · 3 reactions · Opened Jul 16, 2026
end of line: LF v CRLF Open

blocked: upstream type: enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

haskell/cabal#12074 · 3 comments · 1 reaction · Opened Jul 1, 2026
Add `cabal-testsuite` as package for changelogs Open

re: changelog type: enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

haskell/cabal#12070 · 2 comments · Opened Jul 1, 2026
Use AI to craft more readable error and warning messages Open

attention: pr-welcome documentation

Difficulty 5/5 Over a week Newbie friendliness 35/100

haskell/cabal#12020 · 9 comments · 2 reactions · Opened Jun 25, 2026
Cabal is unhelpful when updating `.cabal` version Open

attention: pr-welcome cabal-install: cmd/check type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 55/100

haskell/cabal#12014 · 2 comments · Opened Jun 24, 2026
Way `--enable-library-bytecode` is not honoured by `repl` Open

attention: pr-welcome bytecode-artefacts cabal-install: cmd/repl type: bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

haskell/cabal#11981 · 4 comments · Opened Jun 18, 2026
Improvement: Improve GHC optimization flag management and interaction Open

re: ghc-options type: enhancement

haskell/cabal#11958 · 1 reaction · 1 assignee · Opened Jun 10, 2026
Refactor: Improve rendering of -O and -g flags as numeric levels Open

re: flag type: enhancement

haskell/cabal#11956 · 1 reaction · 1 assignee · Opened Jun 10, 2026
backport semaphore-compat-0.2 support to 3.14 and 3.16 Open

re: semaphores

Difficulty 3/5 1-2 days Newbie friendliness 55/100

haskell/cabal#11946 · 4 comments · Opened Jun 7, 2026
PackageTest fails calling removePathForcibly Open

platform: windows type: bug type: testing

Difficulty 3/5 1-2 days Newbie friendliness 52/100

haskell/cabal#11933 · 2 comments · 1 reaction · Opened Jun 4, 2026
cabal-3.17 crashes during configure process with GHC 10 Open

can-workaround status: consider closing type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

haskell/cabal#11927 · 9 comments · Opened Jun 2, 2026
Flush `stdout` or `verbosityChosenOutputHandle`? Open

attention: pr-welcome type: user-question

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

haskell/cabal#11899 · 1 comment · Opened May 28, 2026
Warn or error on project explicitly importing .freeze or .local Open

attention: pr-welcome type: enhancement

haskell/cabal#11898 · 1 comment · 1 assignee · Opened May 28, 2026
Warn about not using `.project` extension for projects. Open

attention: pr-welcome type: discussion type: enhancement

haskell/cabal#11888 · 5 comments · 1 reaction · 1 assignee · Opened May 26, 2026
Replace expensive unique-like implementations Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

haskell/cabal#11861 · 1 reaction · Opened May 22, 2026

haskell/cabal

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