On 2021-10-30 3:43 p.m., Brandon Allbery wrote:
Wasn't there specifically a new cabal version released to deal with 9.2.1? 3.4.1.0 / 3.6.2.0?
There is a double fault here. Firstly yes, one should use a newer version of cabal-install that is known to support GHC 9.2. So, 3.6.2.0 it is! But GHC 9.2.1 will also play a role... $ cabal --version cabal-install version 3.6.2.0 compiled using version 3.6.2.0 of the Cabal library $ ghc --version The Glorious Glasgow Haskell Compilation System, version 9.2.1 $ cabal install --lib vector Resolving dependencies... Build profile: -w ghc-9.2.1 -O1 In order, the following will be built (use -v for more details): - primitive-0.7.3.0 (lib) (requires download & build) - vector-0.12.3.1 (lib) (requires download & build) [... success ...] $ cat .ghc/x86_64-linux-9.2.1/environments/default clear-package-db global-package-db package-db /home/trebla/.cabal/store/ghc-9.2.1/package.db package-id ghc-9.2.1 package-id bytestring-0.11.1.0 package-id unix-2.7.2.2 package-id base-4.16.0.0 package-id time-1.11.1.1 package-id hpc-0.6.1.0 package-id filepath-1.4.2.1 package-id process-1.6.13.2 package-id array-0.5.4.0 package-id integer-gmp-1.1 package-id containers-0.6.5.1 package-id ghc-boot-9.2.1 package-id binary-0.8.9.0 package-id ghc-prim-0.8.0 package-id ghci-9.2.1 package-id rts package-id terminfo-0.4.1.5 package-id transformers-0.5.6.2 package-id deepseq-1.4.6.0 package-id ghc-boot-th-9.2.1 package-id pretty-1.1.3.6 package-id template-haskell-2.18.0.0 package-id directory-1.3.6.2 package-id text-1.2.5.0 package-id vector-0.12.3.1-0ee0edddd7c1da5d41be6dd7eaa35c896ea170a10f2152c1d1b9be10fa606f06 $ ghci GHCi, version 9.2.1: https://www.haskell.org/ghc/ :? for help ghci> (Foreshadowing: Wait a second! Where is the obligatory message "Loaded package environment etc etc"?) ghci> import Data.Vector <no location info>: error: Could not find module ‘Data.Vector’ Perhaps you meant Data.Functor (from base-4.16.0.0)