Insalling Purescript under Archlinux
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download the binary for linux
$ wget https://github.com/purescript/purescript/releases/download/v0.11.5/linux64.tar.gz - /opt/purescriptw
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smylink the executable
$ ln -s /opt/purescript/purs /usr/local/bin/purs
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install libtinfo
$ gpg --keyserver pgp.mit.edu --recv-keys F7E48EDB # needed for the folloing package $ pacaur -S ncurses5-compat-libs $ pacaur -S libtinfo
see here