src/System/Plugins/Process.hs:59:4: Warning: A do-notation statement discarded a result of type GHC.Conc.ThreadId. Suppress this warning by saying "_ <- forkIO ((>>) E.evaluate (length errput) return GHC.Unit.())", or by using the flag -fno-warn-unused-do-bind [ 3 of 15] Compiling System.Plugins.Parser ( src/System/Plugins/Parser.hs, dist/build/System/Plugins/Parser.o )
src/System/Plugins/Parser.hs:31:0: Warning: The import of `Data.Either' is redundant except perhaps to import instances from `Data.Either' To import instances alone, use: import Data.Either() [ 4 of 15] Compiling System.Plugins.PackageAPI ( src/System/Plugins/PackageAPI.hs, dist/build/System/Plugins/PackageAPI.o )
src/System/Plugins/PackageAPI.hs:61:24: Not in scope: `package'
src/System/Plugins/PackageAPI.hs:62:25: Not in scope: `package' ...
You can just replace 'package' with 'sourcePackageId'