The version of this package in openSUSE:Leap:15.0 has installation issues and may not be installable:

can't install ghc-ansi-wl-pprint-devel-0.6.7.3-lp150.1.4.x86_64:
  package ghc-compiler-8.0.2-lp150.1.10.x86_64 requires gcc, but none of the providers can be installed
  package ghc-ansi-wl-pprint-devel-0.6.7.3-lp150.1.4.x86_64 requires ghc-compiler = 8.0.2, but none of the providers can be installed
  package gcc-7-lp150.1.27.x86_64 requires gcc7, but none of the providers can be installed
  nothing provides libmpfr.so.4()(64bit) needed by gcc7-7.3.0+r257042-lp150.1.3.x86_64