Result of compiling yi and the errors

gistfile1.txt

$ stack --stack-yaml lts-6.yaml install yi --flag yi:vty --flag yi:pango #installing with flags
Invalid flag specification:
- Package 'yi' does not define the following flags (specified on command line):
  pango
  vty
- Flags defined by package 'yi':

$ stack --stack-yaml lts-6.yaml install yi # installing without the flags
Copying from /home/ppk/code/git/yi/.stack-work/install/x86_64-linux/lts-6.19/7.10.3/bin/yi to /home/ppk/.local/bin/yi

Copied executables to /home/ppk/.local/bin:
- yi

$ stack exec yi  # executing 
Configuration '/home/ppk/.config/yi/yi.hs' changed. Recompiling.
Error occurred while loading configuration file.
yi: panic: no frontend compiled in! (configure with -fvty or another frontend.)
CallStack (from HasCallStack):
  error, called at src/Yi/Config/Default.hs:87:31 in yi-core-0.13.0.1-I1ZHUhLqSSi5xLyazMQIVc:Yi.Config.Default

Fixed it finally. Not really sure how it went but

1. Only do stack install and not stack install yi
2. copy the example config file from the examples-config to ~/.config/yi/yi.hs
3. need to stack install gtk2hs-buildtools separately
4. Make sure that libgtk2.* installed (libgtk2.0-dev on my debian)

There was lot of linking issue as well. Had to nuke .stack