Yi failed to install

Question

Would love to try the Yi editor, but unfortunately, it keeps failing during the installation.

First I get:

> cabal install yi
haskell-src-exts-1.13.0 failed during the configure step. The exception was:
ExitFailure 1
yi-0.6.5.0 depends on haskell-src-exts-1.13.0 which failed to install.

then when I try to install haskell-src-exts I am stumped by this:

setup: The program happy version >=1.17 is required but it could not be found.
cabal: Error: some packages failed to install:
haskell-src-exts-1.13.0 failed during the configure step. The exception was:
ExitFailure 1

installing happy cabal install happy (version 1.18.9 at that) does not help, as it still produces the error above!

I am trying to get this going on ArchLinux. Also, Windows installation didn't work either.

Any ideas?

Answer 1

cabal installs programs to ~/.cabal/bin (on Unix; no idea about Windows) if they are not already installed, and does not warn you to add it to your $PATH; it also (unless you have the latest unreleased version, built from its repo) does not know that it has done so, because it only tracks libraries, not executables. You will need to manually add $HOME/.cabal/bin to your $PATH so that it will be found

(edit be pedantic)