[Barrelfish-users] GHC 7.0.2 and hake/hake.sh not working

[yoken at mymail.fi]

So im trying to get this compile on Arch Linux with no succes.
Here is wht I get when I run the hake.sh script to generate the Makefile.

OK, source directory is ..
Creating a local hake directory...
Setting up hake build directory...
Creating new symbolic_targets.mk file.
Building hake...
[ 1 of 12] Compiling Path             ( ../hake/Path.hs, hake/Path.o )
[ 2 of 12] Compiling HakeTypes        ( ../hake/HakeTypes.hs,
hake/HakeTypes.o )
[ 3 of 12] Compiling Args             ( ../hake/Args.hs, hake/Args.o )
[ 4 of 12] Compiling Config           ( hake/Config.hs, hake/Config.o )
[ 5 of 12] Compiling X86_64           ( ../hake/X86_64.hs, hake/X86_64.o )
[ 6 of 12] Compiling X86_32           ( ../hake/X86_32.hs, hake/X86_32.o )
[ 7 of 12] Compiling SCC              ( ../hake/SCC.hs, hake/SCC.o )
[ 8 of 12] Compiling ARM              ( ../hake/ARM.hs, hake/ARM.o )
[ 9 of 12] Compiling ARM11MP          ( ../hake/ARM11MP.hs, hake/ARM11MP.o )
[10 of 12] Compiling Beehive          ( ../hake/Beehive.hs, hake/Beehive.o )
[11 of 12] Compiling RuleDefs         ( ../hake/RuleDefs.hs,
hake/RuleDefs.o )
[12 of 12] Compiling Main             ( ../hake/Main.hs, hake/Main.o )

../hake/Main.hs:274:25:
    Not in scope: data constructor `Opt_DeriveDataTypeable'