Failed updating to 1.4.9 and Tidal doesn't run anymore

[ganz]

Hello Alex,

since my unsuccessful try to update to 1.4.9 Tidal Cycles doesn't run anymore. Atom reports:

Custom ghci path configured: ~/.ghcup/bin/ghci
Ghci command: /Users/Axel/.ghcup/bin/ghci
Ghc-pkg command: /Users/Axel/.ghcup/bin/ghc-pkg
Load BootTidal.hs from /Users/Axel/.atom/packages/tidalcycles/lib/BootTidal.hs
Loaded package environment from /Users/Axel/.ghc/x86_64-darwin-8.6.5/environments/default

: error:
Ambiguous module name ‘Sound.Tidal.Context’:
it was found in multiple packages: tidal-1.4.7 tidal-1.4.7

Variable not in scope: d1 :: t0 -> t

• Variable not in scope: sound :: [Char] -> t0
• Perhaps you meant ‘round’ (imported from Prelude)

Variable not in scope: d1 :: t0 -> t

• Variable not in scope: sound :: [Char] -> t0
• Perhaps you meant ‘round’ (imported from Prelude)

---

Maybe my problem is similar to the one [montoyamoraga] had.
Should I delete /Users/Axel/.ghc/x86_64-darwin-8.6.5/environments/default ?
And if yes, how?

(Profile - montoyamoraga - Tidal Club)
Mac OSX - new install / cannot start tidal on Mac OSX catalina

[yaxu]

Yes this is an often seen bug in haskell/cabal. You should indeed delete that package environment file. You can do it from a terminal window with:

rm /Users/Axel/.ghc/x86_64-darwin-8.6.5/environments/default

[ganz]

I tried to do so at Terminal. But it seems that Tidal still does not work.

[ganz]

To be shure to have deleted I repeated the instruction.

![Bildschirmfoto 2020-04-29 um 11.46.30|690x222](upload://pXxq2YqmQh9WOJ2OcXW4Abx3vnD.png) 

Do I have to delete all and install TC completely new?

[ganz]

@yaxu: Ok. Now I got it. Obviously in some way i deleted to much. Installed TC 1.4.9 new again. And it works!