>>> Emerging (2 of 7) dev-util/darcs-2.2.1 from gentoo-haskell
 * darcs-2.2.1.tar.gz RMD160 SHA1 SHA256 size ;-) ...                                                                                                    [ ok ]
 * checking ebuild checksums ;-) ...                                                                                                                     [ ok ]
 * checking auxfile checksums ;-) ...                                                                                                                    [ ok ]
 * checking miscfile checksums ;-) ...                                                                                                                   [ ok ]
>>> Unpacking source...
>>> Unpacking darcs-2.2.1.tar.gz to /var/tmp/portage/dev-util/darcs-2.2.1/work
 * Applying darcs-1.0.9-bashcomp.patch ...                                                                                                                [ ok ]
>>> Source unpacked in /var/tmp/portage/dev-util/darcs-2.2.1/work
>>> Compiling source in /var/tmp/portage/dev-util/darcs-2.2.1/work/darcs-2.2.1 ...
 * Using cabal-1.6.0.3.
[1 of 2] Compiling Distribution.ShellHarness ( Distribution/ShellHarness.hs, Distribution/ShellHarness.o )
[2 of 2] Compiling Main             ( /var/tmp/portage/dev-util/darcs-2.2.1/work/darcs-2.2.1/Setup.lhs, /var/tmp/portage/dev-util/darcs-2.2.1/work/darcs-2.2.1/Setup.o )
Linking setup ...
Configuring darcs-2.2.1...
setup: At least the following dependencies are missing:
parsec ==2.1.* && ==2.1.*
 *
 * ERROR: dev-util/darcs-2.2.1 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2972:  Called cabal_src_compile
 *             environment, line  567:  Called cabal-configure
 *             environment, line  490:  Called die
 * The specific snippet of code:
 *       ./setup configure --ghc --prefix=/usr --with-compiler="$(ghc-getghc)" --with-hc-pkg="$(ghc-getghcpkg)" --prefix=/usr --libdir=/usr/$(get_libdir) --libsubdir=${P}/ghc-$(ghc-version) --datadir=/usr/share/ --datasubdir=${P}/ghc-$(ghc-version) ${cabalconf} ${CABAL_CONFIGURE_FLAGS} "$@" || die "setup configure failed"
 *  The die message:
 *   setup configure failed
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-util/darcs-2.2.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-util/darcs-2.2.1/temp/environment'.
 * This ebuild used the following eclasses from overlays:
 *   /usr/local/portage/layman/haskell/eclass/haskell-cabal.eclass
 *   /usr/local/portage/layman/haskell/eclass/ghc-package.eclass
 * This ebuild is from an overlay named 'gentoo-haskell': '/usr/local/portage/layman/haskell/'
 *

>>> Failed to emerge dev-util/darcs-2.2.1, Log file:

>>>  '/var/tmp/portage/dev-util/darcs-2.2.1/temp/build.log'

 * Messages for package dev-util/darcs-2.2.1:

 *
 * ERROR: dev-util/darcs-2.2.1 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2972:  Called cabal_src_compile
 *             environment, line  567:  Called cabal-configure
 *             environment, line  490:  Called die
 * The specific snippet of code:
 *       ./setup configure --ghc --prefix=/usr --with-compiler="$(ghc-getghc)" --with-hc-pkg="$(ghc-getghcpkg)" --prefix=/usr --libdir=/usr/$(get_libdir) --libsubdir=${P}/ghc-$(ghc-version) --datadir=/usr/share/ --datasubdir=${P}/ghc-$(ghc-version) ${cabalconf} ${CABAL_CONFIGURE_FLAGS} "$@" || die "setup configure failed"
 *  The die message:
 *   setup configure failed
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-util/darcs-2.2.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-util/darcs-2.2.1/temp/environment'.
 * This ebuild used the following eclasses from overlays:
 *   /usr/local/portage/layman/haskell/eclass/haskell-cabal.eclass
 *   /usr/local/portage/layman/haskell/eclass/ghc-package.eclass
 * This ebuild is from an overlay named 'gentoo-haskell': '/usr/local/portage/layman/haskell/'
 *

 * GNU info directory index is up-to-date.

!!! existing preserved libs:
>>> package: sys-libs/readline-5.2_p13
 *  - /lib64/libhistory.so.6
 *  - /lib64/libhistory.so.6.0
 *      used by /usr/bin/qalc (sci-libs/libqalculate-0.9.6-r1)
 *  - /lib64/libreadline.so.6
 *  - /lib64/libreadline.so.6.0
 *      used by /lib64/libdevmapper-event-lvm2mirror.so.2.02 (sys-fs/lvm2-2.02.45)
 *      used by /lib64/libdevmapper-event.so.1.02 (sys-fs/lvm2-2.02.45)
 *      used by /lib64/libdevmapper.so.1.02 (sys-fs/lvm2-2.02.45)
 *      used by 23 other files
Use emerge @preserved-rebuild to rebuild packages using these libraries
<<< 17:06.31 Sun May 03 2009!~/work/kubuntu-theme-v2
<<< ryan@lambda!pts/7 E:1
>>>                                                                                                                                     ~/work/kubuntu-theme-v2
<<< 17:08.01 Sun May 03 2009!~/work/kubuntu-theme-v2
<<< ryan@lambda!pts/7 E:1
>>> emerge --search parsec                                                                                                              ~/work/kubuntu-theme-v2
Searching...
[ Results for search key : parsec ]
[ Applications found : 2 ]

*  dev-haskell/parsec
      Latest version available: 3.0.0
      Latest version installed: 3.0.0
      Size of files: 26 kB
      Homepage:      http://www.cs.uu.nl/~daan/parsec.html
      Description:   Monadic parser combinators
      License:       BSD

*  dev-haskell/regex-parsec
      Latest version available: 0.90
      Latest version installed: [ Not Installed ]
      Size of files: 22 kB
      Homepage:      http://sourceforge.net/projects/lazy-regex
      Description:   Replaces/Enhances Text.Regex
      License:       BSD