Resolving dependencies... Configuring file-embed-0.0.10... Building file-embed-0.0.10... Installed file-embed-0.0.10 Configuring clr-host-0.1.0.0... Failed to install clr-host-0.1.0.0 Build log ( /home/builder/.cabal/logs/clr-host-0.1.0.0.log ): cabal: Entering directory '/tmp/cabal-tmp-31128/clr-host-0.1.0.0' [1 of 1] Compiling Main ( /tmp/cabal-tmp-31128/clr-host-0.1.0.0/dist/setup/setup.hs, /tmp/cabal-tmp-31128/clr-host-0.1.0.0/dist/setup/Main.o ) Linking /tmp/cabal-tmp-31128/clr-host-0.1.0.0/dist/setup/setup ... Configuring clr-host-0.1.0.0... setup: The program 'csc' is required but it could not be found. cabal: Leaving directory '/tmp/cabal-tmp-31128/clr-host-0.1.0.0' cabal: Error: some packages failed to install: clr-host-0.1.0.0 failed during the configure step. The exception was: ExitFailure 1