paludis + ghc::haskell

kai@laptop ~> cave show ghc::gentoo
* dev-lang/ghc::gentoo
    ::gentoo                  7.4.2 {:0/7.4.2} 7.6.3-r1 {:0/7.6.3} (7.8.3)K {:0/7.8.3} 7.8.4* {:0/7.8.4} (7.10.2)K (7.10.2-r1)K {:0/7.10.2}
    dev-lang/ghc-7.8.4:0::gentoo (world)
    Description               The Glasgow Haskell Compiler
    Homepage                  http://www.haskell.org/ghc/
    Herds                     haskell
    Use flags
        USE
            -binary           Install the binary version directly, rather than using it to build the source version.
            -doc              Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
            -ghcbootstrap     Bootstrap from an existing GHC installation.
            -ghcmakebinary    Build with less runtime depends (bundle libffi for building bootstrap binaries).
            gmp               Add support for dev-libs/gmp (GNU MP library)
        Build Options
            symbols=split     How to handle debug symbols in installed files
                              Permitted values:
                                  compress:  Split and compress debug symbols
                                  preserve:  Preserve debug symbols
                                  split:     Split debug symbols
                                  strip:     Strip debug symbols
            -dwarf_compress   Compress DWARF2+ debug information
            -optional_tests   Run tests considered by the package to be optional
            -trace            Trace actions executed by the package (very noisy, for debugging broken builds only)
            work=tidyup       Whether to preserve or remove working directories
                              Permitted values:
                                  leave:     Do not remove, but allow destructive merges
                                  preserve:  Preserve the working directory
                                  remove:    Always remove the working directory
                                  tidyup:    Tidy up work directory after a successful build

kai@laptop ~> cave show ghc::haskell
* dev-lang/ghc::haskell
cave@1453463043: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.4.2::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.4.2::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.4.2::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.4.2::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.4.2.ebuild:114)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13091 exit with error
die trap: exiting with error.
'
cave@1453463043: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.4.2::haskell'
cave@1453463043: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.4.2::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.4.2::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463043: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.6.3-r1::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.6.3-r1::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.6.3-r1::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.6.3-r1::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.6.3-r1.ebuild:125)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13157 exit with error
die trap: exiting with error.
'
cave@1453463043: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.6.3-r1::haskell'
cave@1453463043: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.6.3-r1::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.6.3-r1::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463043: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.8.4::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.8.4::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.8.4::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.8.4.ebuild:102)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13223 exit with error
die trap: exiting with error.
'
cave@1453463043: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.8.4::haskell'
cave@1453463043: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.8.4::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463044: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4-r3::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.8.4-r3::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.8.4-r3::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.8.4-r3::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.8.4-r3.ebuild:110)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13289 exit with error
die trap: exiting with error.
'
cave@1453463044: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.8.4-r3::haskell'
cave@1453463044: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4-r3::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.8.4-r3::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463044: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4-r4::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.8.4-r4::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.8.4-r4::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.8.4-r4::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.8.4-r4.ebuild:110)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13355 exit with error
die trap: exiting with error.
'
cave@1453463044: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.8.4-r4::haskell'
cave@1453463044: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4-r4::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.8.4-r4::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463044: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4-r5::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.8.4-r5::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.8.4-r5::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.8.4-r5::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.8.4-r5.ebuild:110)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13421 exit with error
die trap: exiting with error.
'
cave@1453463044: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.8.4-r5::haskell'
cave@1453463044: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.8.4-r5::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.8.4-r5::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463045: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.2::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.10.2::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.10.2::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.10.2::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.10.2.ebuild:111)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13487 exit with error
die trap: exiting with error.
'
cave@1453463045: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.10.2::haskell'
cave@1453463045: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.2::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.10.2::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463045: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.2-r1::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.10.2-r1::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.10.2-r1::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.10.2-r1::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.10.2-r1.ebuild:111)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13553 exit with error
die trap: exiting with error.
'
cave@1453463045: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.10.2-r1::haskell'
cave@1453463045: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.2-r1::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.10.2-r1::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463045: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.3_rc1::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.10.3_rc1::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.10.3_rc1::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.10.3_rc1::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.10.3_rc1.ebuild:108)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13619 exit with error
die trap: exiting with error.
'
cave@1453463045: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.10.3_rc1::haskell'
cave@1453463045: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.3_rc1::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.10.3_rc1::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463045: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.3::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-7.10.3::haskell':
  ... Could not generate cache for 'dev-lang/ghc-7.10.3::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-7.10.3::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-7.10.3.ebuild:108)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13685 exit with error
die trap: exiting with error.
'
cave@1453463045: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-7.10.3::haskell'
cave@1453463045: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-7.10.3::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-7.10.3::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463046: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-8.0.1_rc1::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-8.0.1_rc1::haskell':
  ... Could not generate cache for 'dev-lang/ghc-8.0.1_rc1::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-8.0.1_rc1::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-8.0.1_rc1.ebuild:98)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13751 exit with error
die trap: exiting with error.
'
cave@1453463046: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-8.0.1_rc1::haskell'
cave@1453463046: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-8.0.1_rc1::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-8.0.1_rc1::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
cave@1453463046: [WARNING e.ebuild.cache_failure] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-9999::haskell':
  ... When running an ebuild command on 'dev-lang/ghc-9999::haskell':
  ... Could not generate cache for 'dev-lang/ghc-9999::haskell', stdout says '' and stderr says '
!!! ERROR in dev-lang/ghc-9999::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-9999.ebuild:111)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13817 exit with error
die trap: exiting with error.
'
cave@1453463046: [WARNING e.ebuild.metadata.unusable] No usable metadata for 'dev-lang/ghc-9999::haskell'
cave@1453463046: [WARNING e.ebuild.postload_eapi.mismatch] In thread ID '13084':
  ... In program cave show ghc::haskell:
  ... When finding all versions grouped by slot from packages matching dev-lang/ghc::haskell with filter all matches:
  ... When generating metadata for ID 'dev-lang/ghc-9999::haskell':
  ... When loading generated metadata for 'dev-lang/ghc-9999::haskell':
  ... Post-source EAPI 'UNKNOWN' does not match pre-source EAPI '5', treating as unknown
    ::haskell                 (7.4.2)E (7.6.3-r1)E (7.8.4)E (7.8.4-r3)E (7.8.4-r4)E (7.8.4-r5)E (7.10.2)E (7.10.2-r1)E (7.10.3_rc1)E (7.10.3)E (8.0.1_rc1)E (9999)E* {no slot}
    dev-lang/ghc-9999::haskell (world)
    Captured stderr
!!! ERROR in dev-lang/ghc-9999::haskell:
!!! In useq at line 30
!!! Flag 'binary' is not included in IUSE_EFFECTIVE=""

!!! Call stack:
!!!    * useq (/usr/libexec/paludis/5/list_functions.bash:30)
!!!    * use (/usr/libexec/paludis/0/list_functions.bash:25)
!!!    * source (/usr/portage/local/haskell/dev-lang/ghc/ghc-9999.ebuild:111)
!!!    * ebuild_load_ebuild (/usr/libexec/paludis/ebuild.bash:404)
!!!    * ebuild_main (/usr/libexec/paludis/ebuild.bash:657)
!!!    * main (/usr/libexec/paludis/ebuild.bash:698)

diefunc: making ebuild PID 13817 exit with error
die trap: exiting with error.

    Choices
        Masked
            eapi              Unsupported EAPI 'UNKNOWN' (likely a broken package or configuration error)

kai@laptop ~> cave show paludis
* sys-apps/paludis
    ::gentoo                  (1.4.2-r1)K 2.0.0 (2.2.0)K (2.2.0-r2)K 2.4.0* (2.4.0_p20160112)K (9999)K {:0}
    ::installed               2.4.0_p20160112 {:0}
    sys-apps/paludis-2.4.0_p20160112:0::installed (world)
    Description               paludis, the other package mangler
    Homepage                  http://paludis.exherbo.org/
    From repositories         gentoo
    Installed time            Tue Jan 19 21:28:19 GMT 2016
    Installed using           paludis-2.4.0
    License                   GPL-2 vim
    Use flags
        USE
            (-doc)
            (pbins)
            (-pink)
            (-python)
            (-ruby)
            (-search-index)
            (xml)
            (-test)
        python_targets
            (python2_7)
        Build Options
            -trace            Trace actions executed by the package (very noisy, for debugging broken builds only)
    sys-apps/paludis-2.4.0:0::gentoo (world)
    Description               paludis, the other package mangler
    Homepage                  http://paludis.exherbo.org/
    Maintainers               Jeff Horelick <jdhore@gentoo.org> Michał Górny <mgorny@gentoo.org>
    Use flags
        USE
            -doc              Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
            pbins             Enable binary package support. Adds dependency upon app-arch/libarchive
            -pink             Use a less boring colourscheme than the default
            -python           Add optional support/bindings for the Python language
            -ruby             Add support/bindings for the Ruby language
            -search-index     Enable cave search --index. Requires dev-db/sqlite.
            xml               Build xml things for metadata.xml and GLSA support (needs dev-libs/libxml2).
            (-test)           Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore
        python_targets
            python2_7         Build with Python 2.7
        Build Options
            symbols=split     How to handle debug symbols in installed files
                              Permitted values:
                                  compress:  Split and compress debug symbols
                                  preserve:  Preserve debug symbols
                                  split:     Split debug symbols
                                  strip:     Strip debug symbols
            -dwarf_compress   Compress DWARF2+ debug information
            -optional_tests   Run tests considered by the package to be optional
            -trace            Trace actions executed by the package (very noisy, for debugging broken builds only)
            work=tidyup       Whether to preserve or remove working directories
                              Permitted values:
                                  leave:     Do not remove, but allow destructive merges
                                  preserve:  Preserve the working directory
                                  remove:    Always remove the working directory
                                  tidyup:    Tidy up work directory after a successful build