GHC CVS: abort during install

Building GHC from CVS aborts during the install phase:

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------------------------------------------------------------------------
===fptools== Recursively making `install' in users_guide ...
PWD = /var/tmp/portage/ghc-cvs-5.05-r1/work/fptools/ghc/docs
------------------------------------------------------------------------
------------------------------------------------------------------------
==fptools== make install - --no-print-directory -r;
 in /var/tmp/portage/ghc-cvs-5.05-r1/work/fptools/ghc/docs/users_guide
------------------------------------------------------------------------
make[3]: Für das Ziel »install« ist nichts zu tun.
------------------------------------------------------------------------
===fptools== Finished making `install' in users_guide ...
PWD = /var/tmp/portage/ghc-cvs-5.05-r1/work/fptools/ghc/docs
------------------------------------------------------------------------
------------------------------------------------------------------------
==fptools== make install -wr;
 in /var/tmp/portage/ghc-cvs-5.05-r1/work/fptools/ghc/compiler
------------------------------------------------------------------------
../../ghc/compiler/stage1/ghc-inplace -H16m -O  -istage2/utils  
-istage2/basicTypes  -istage2/types  -istage2/hsSyn  -istage2/prelude  
-istage2/rename  -istage2/typecheck  -istage2/deSugar  -istage2/coreSyn  
-istage2/specialise  -istage2/simplCore  -istage2/stranal  -istage2/stgSyn  
-istage2/simplStg  -istage2/codeGen  -istage2/absCSyn  -istage2/main  
-istage2/profiling  -istage2/parser  -istage2/cprAnalysis  -istage2/compMan  
-istage2/ndpFlatten  -istage2/nativeGen  -istage2/ghci -DGHCI -package 
haskell-src -package unix -package readline  -cpp -fglasgow-exts -Rghc-timing 
-I. -IcodeGen -InativeGen -Iparser -recomp -Rghc-timing  -H16M '-#include 
"hschooks.h"'    -c absCSyn/AbsCSyn.lhs -o stage2/absCSyn/AbsCSyn.o  -ohi 
stage2/absCSyn/AbsCSyn.hi
ghc-5.05: error: directory portion of "stage2/absCSyn/AbsCSyn.o" does not exist 
(used with "-o" option.)
make[2]: *** [stage2/absCSyn/AbsCSyn.o] Fehler 1
make[1]: *** [install] Fehler 1
make[1]: Leaving directory `/var/tmp/portage/ghc-cvs-5.05-r1/work/fptools/ghc'
make: *** [install] Fehler 1

!!! ERROR: dev-lang/ghc-cvs-5.05-r1 failed.
!!! Function src_install, Line 112, Exitcode 2
!!! (no error message)

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Let me know if you need additional information. BTW Are you keen on
error reports for CVS GHC?

Cheers, Ralf