Updated for Cabal 3's need to be pointed to package.db. Fixes tidalcycles#583.

Breaks older versions of ghc I guess, and also does not address
Windows systems. And what if libraries are not under user's home
directory? Checks of success of the shell command would be good.

Author: xmacex

tidal.el

@@ -65,7 +65,7 @@
              ("separator" . "\\")
              ))
           ((or (string-equal system-type "darwin") (string-equal system-type "gnu/linux"))
-           '(("path" . "ghc-pkg describe $(ghc-pkg latest tidal) | grep data-dir | cut -f2 -d' '")
+           '(("path" . "ghc-pkg describe -f ~/.cabal/store/ghc-$(ghc --numeric-version)/package.db tidal | grep data-dir | cut -f2 -d':'")
              ("separator" . "/")
              ))
           )