Manually installation of pandoc in Arch linux

According to the installation guide from the Pandoc homepage
We need to install the Haskell platform first.

Adding the following entry to /etc/pacman.conf (above [extra])(ref):
```
[haskell-core]
Server = http://xsounds.org/~haskell/core/$arch
```

Then using the following commands to add the key

sudo pacman-key -r 4209170B
sudo pacman-key --lsign-key 4209170B

(Optional)If you don’t get the following error ignore this step.

$ sudo pacman-key -r 4209170B
gpg: connecting dirmngr at ‘/root/.gnupg/S.dirmngr’ failed: IPC connect call failed
gpg: keyserver receive failed: No dirmngr
==> ERROR: Remote key not fetched correctly from keyserver.

The solution is to create an empty dirmngr_ldapservers.conf file under /root/.gnupg(I don’t have the .gnupg folder, so need to create one first) and afterwards, the pacman-key commands should work fine(ref) :
```
sudo mkdir -p /root/.gnupg
sudo touch /root/.gnupg/dirmngr_ldapservers.conf
```
Next force a refresh of all package lists:
```
sudo pacman -Syy
```
Then install the Haskell platform from the official repositories(ref):
```
sudo pacman -S ghc cabal-install haddock happy alex
```
Then use the cabal tool to install pandoc, you can update cabal-install first if new version is available(time consuming process).
```
cabal update
cabal install cabal-install
cabal install pandoc
```
At last, set PATH variable so that the pandoc command can be found. Adding the following line to the ~/.bash_profile file:
```
export PATH=~/.cabal/bin:$PATH
```

References

Dreamhunter's Blog