Issues

• Adding write-ghc-environment-files: always to cabal.project.local does not trigger rebuild

  Cabal: cmd/buildtype: bug
  haskell/cabal#12408 · Filter by author andreasabel opened on Oct 4, 2026

• cabal-install tarballs come with plan.json

  releasetype: enhancement
  haskell/cabal#12405 · Filter by author ffaf1 opened on Oct 2, 2026
  1

• Link to known programs

  attention: pr-welcomedocumentation
  haskell/cabal#12402 · Filter by author philderbeast opened on Sep 30, 2026

• Document which are our LTS releases

  documentationtype: discussion
  haskell/cabal#12373 · Filter by author philderbeast opened on Sep 22, 2026
  1

• cabal haddock --haddock-for-hackage only includes internal library in tarball

  cabal-install: cmd/haddockre: internal librarytype: bug
  haskell/cabal#12364 · Filter by author Saizan opened on Sep 18, 2026
  4

• Distribution.Utils.Structured returns the same hash for different structures due to string boundary confusion

  attention: pr-welcometype: bug
  haskell/cabal#12360 · Filter by author fgaz-scrive opened on Sep 15, 2026

• Cabal does not use the C toolchain GHC was configured with

  type: bug
  haskell/cabal#12332 · Filter by author zlonast opened on Sep 8, 2026
  4

  

• Usefulness of releasing cabal-install the library

  type: discussiontype: enhancement
  haskell/cabal#12326 · Filter by author ffaf1 opened on Sep 6, 2026
  3

• cabal 3.18.1.0 effectively dropped semaphore support

  blocked: upstreamtype: bug
  haskell/cabal#12306 · Filter by author arybczak opened on Aug 31, 2026
  3

• cabal-install should try to minimise the critical path when compiling a build graph concurrently

  cabal-install: cmd/buildtype: enhancementtype: performance
  haskell/cabal#12305 · Filter by author sheaf opened on Aug 31, 2026

• Release checklist for 3.18.2.0 (minor release)

  release
  haskell/cabal#12295 · Filter by author ffaf1 opened on Aug 28, 2026
  20

• Adding a javascript target to check compatibility.

  attention: pr-welcometype: enhancement
  haskell/cabal#12293 · Filter by author zlonast opened on Aug 28, 2026

• Package Description Format Specification History doesn't mention Make changes

  type: bug
  haskell/cabal#12292 · Filter by author phadej opened on Aug 27, 2026

• Somewhere between 3.16 and 3.18 parseConditionConfVar got a new argument. I cannot find a changelog entry for it.

  API changedocumentation
  haskell/cabal#12286 · Filter by author phadej opened on Aug 26, 2026
  4

• path for hcp coverage report

  attention: pr-welcometype: enhancement
  haskell/cabal#12285 · Filter by author marcosh opened on Aug 26, 2026
  1

• cabalSpecLatest remains 3.16 in cabal-install 3.18.1.0, causing cabal-version: 3.18 Simple packages to fail

  attention: needs-backport 3.18attention: pr-welcomeregression in 3.18type: bug
  haskell/cabal#12271 · Filter by author andreabedini opened on Aug 24, 2026
  8

• Question: Behaviour of cabal install vs cabal build? (Placement of build artefacts)

  type: user-question
  haskell/cabal#12270 · Filter by author AndreasPK opened on Aug 24, 2026

• On windows cabal-install can't cabal install cabal-install.

  can-workaroundneeds triageplatform: windowstype: bug
  haskell/cabal#12269 · Filter by author AndreasPK opened on Aug 24, 2026
  7

• Bad error message on cabal run with multiple executable

  attention: pr-welcomere: error-messagetype: enhancement
  haskell/cabal#12262 · Filter by author mpscholten opened on Aug 23, 2026
  1

  

• documentation: True runs Haddock for inferred multi-repl targets

  attention: pr-welcomecabal-install: cmd/repltype: bug
  haskell/cabal#12242 · Filter by author shokohara opened on Aug 17, 2026
  5

• update bootstrap scripts for the 3.18.1.0 release

  cabal-install: bootstrapreleasetype: enhancement
  haskell/cabal#12233 · Filter by author ulysses4ever opened on Aug 15, 2026
  

• cabal run stopped recognizing target name after -- with cabal-install 3.18.1.0

  cabal-install: cmd/rundocumentationregression in 3.18
  haskell/cabal#12231 · Filter by author tfausak opened on Aug 14, 2026
  26

• Deprecate legacy --prefer-oldest CLI flag

  type: enhancement
  haskell/cabal#12217 · Filter by author TeofilC opened on Aug 7, 2026
  1

• Quoted component names containing spaces are impossible to refer to

  re: internal librarytype: bug
  haskell/cabal#12207 · Filter by author leana8959 opened on Aug 3, 2026
  7

• cabal-3.18.1.0 with older lib:Cabal custom setup package crashes HLS

  can-workaroundtype: bug
  haskell/cabal#12186 · Filter by author fendor opened on Jul 30, 2026