Resolving dependencies...
Configuring posix-pty-0.1.1...
cabal: Package posix-pty-0.1.1 can't be built on this system.
Failed to install posix-pty-0.1.1
cabal: Error: some packages failed to install:
posix-pty-0.1.1 failed during the building phase. The exception was:
ExitFailure 1