# Could not load module ‘System.IO’

**URL:** <https://uzu.lurk.org/t/could-not-load-module-system-io/4652>\
**Category:** TidalCycles\
**Tags:** installation\
**Created:** [9 April 2023 14:39 UTC](https://uzu.lurk.org/t/could-not-load-module-system-io/4652 "2023-04-09T14:39:50Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jwaldmann](https://uzu.lurk.org/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jwaldmann](https://uzu.lurk.org/u/jwaldmann)\
**Post date:** [10 April 2023 17:17 UTC](https://uzu.lurk.org/t/could-not-load-module-system-io/4652/2 "2023-04-10T17:17:55Z")

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whoa, "hidden base". What happened before that? How did you install tidalcycles?

If it was something like `cabal install tidal --lib`, then: I observed a similar thing here ([cabal install --lib \<something\> creates environment file that does not mention base · Issue #8894 · haskell/cabal · GitHub](https://github.com/haskell/cabal/issues/8894)) apparently it's a design decision in recent `cabal-install`.

What is the contents of `/Users/sofolofo/.ghc/aarch64-darwin-9.2.2/environments/default`? What does `cabal --version` say? NB: ghc-9.2.2 is obsolete, current versions are 9.2.7, or 9.4.4, or 9.6.1, see [Download — The Glasgow Haskell Compiler](https://www.haskell.org/ghc/download.html) (current stable releases)

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