Resolving dependencies... Downloading Omega-1.0.1... [1 of 1] Compiling Main ( /tmp/cabal-tmp-9190/Omega-1.0.1/dist/setup/setup.hs, /tmp/cabal-tmp-9190/Omega-1.0.1/dist/setup/Main.o ) Linking /tmp/cabal-tmp-9190/Omega-1.0.1/dist/setup/setup ... DoSetup.hs:12:5: warning: #warning "Building with an unrecognized version of Cabal" [-Wcpp] # warning "Building with an unrecognized version of Cabal" ^ DoSetup.hs:16:4: error: #error "Unsupported Cabal version" # error "Unsupported Cabal version" ^ setup: user error (Error occured when building the setup script) Failed to install Omega-1.0.1 cabal: Error: some packages failed to install: Omega-1.0.1 failed during the configure step. The exception was: ExitFailure 1