Resolving dependencies...
Configuring sparsecheck-0.1.0.1...
Building sparsecheck-0.1.0.1...
Failed to install sparsecheck-0.1.0.1
Build log ( /home/builder/.cabal/logs/sparsecheck-0.1.0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-24450/sparsecheck-0.1.0.1'
Warning: sparsecheck.cabal: Unknown fields: build-depends (line 6)
Fields allowed in this section:
name, version, cabal-version, build-type, license, license-file,
license-files, copyright, maintainer, stability, homepage,
package-url, bug-reports, synopsis, description, category, author,
tested-with, data-files, data-dir, extra-source-files,
extra-tmp-files, extra-doc-files
Configuring sparsecheck-0.1.0.1...
Building sparsecheck-0.1.0.1...
Preprocessing library sparsecheck-0.1.0.1...
[1 of 1] Compiling SparseCheck      ( SparseCheck.hs, dist/build/SparseCheck.o )

SparseCheck.hs:6:8: error:
    Failed to load interface for ‘Prelude’
    It is a member of the hidden package ‘base-4.9.0.0’.
    Perhaps you need to add ‘base’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

SparseCheck.hs:8:1: error:
    Failed to load interface for ‘Control.Monad’
    It is a member of the hidden package ‘base-4.9.0.0’.
    Perhaps you need to add ‘base’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

SparseCheck.hs:9:1: error:
    Failed to load interface for ‘Data.Maybe’
    It is a member of the hidden package ‘base-4.9.0.0’.
    Perhaps you need to add ‘base’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

SparseCheck.hs:10:1: error:
    Failed to load interface for ‘Data.IntMap’
    It is a member of the hidden package ‘containers-0.5.7.1’.
    Perhaps you need to add ‘containers’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-24450/sparsecheck-0.1.0.1'
cabal: Error: some packages failed to install:
sparsecheck-0.1.0.1 failed during the building phase. The exception was:
ExitFailure 1