Resolving dependencies... Configuring softfloat-hs-0.1.0... Failed to install softfloat-hs-0.1.0 Build log ( /home/builder/.cabal/logs/ghc-8.4.3/softfloat-hs-0.1.0-Df2V5BgN6jfLcwZ7PN8wIq.log ): cabal: Entering directory '/tmp/cabal-tmp-1674/softfloat-hs-0.1.0' Configuring softfloat-hs-0.1.0... cabal: Missing dependency on a foreign library: * Missing (or bad) C library: softfloat This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is.If the library file does exist, it may contain errors that are caught by the C compiler at the preprocessing stage. In this case you can re-run configure with the verbosity flag -v3 to see the error messages. cabal: Leaving directory '/tmp/cabal-tmp-1674/softfloat-hs-0.1.0' cabal: Error: some packages failed to install: softfloat-hs-0.1.0-Df2V5BgN6jfLcwZ7PN8wIq failed during the configure step. The exception was: ExitFailure 1