Trying to install a package with cabal-install and Cabal from ghc 7.10-rc2 consistently gives this error message (primitive is just an example):

peter@montebre:~> cabal install primitive
Resolving dependencies...
Configuring primitive-0.5.4.0...
cabal: Distribution/Client/Config.hs:(246,37)-(299,9): Missing field in record construction configProf

This is my package database:

peter@montebre:~> ghc-pkg list
/usr/lib64/ghc-7.10.0.20150123/package.conf.d
   Cabal-1.22.1.0
   HTTP-4000.2.19
   array-0.5.0.1
   base-4.8.0.0
   bin-package-db-0.0.0.0
   binary-0.7.3.0
   bytestring-0.10.6.0
   containers-0.5.6.2
   deepseq-1.4.0.0
   directory-1.2.2.0
   filepath-1.3.1.0
   ghc-7.10.0.20150123
   ghc-prim-0.3.1.0
   haskeline-0.7.2.0
   hoopl-3.10.0.2
   hpc-0.6.0.2
   integer-gmp-1.0.0.0
   mtl-2.2.1
   network-2.4.2.3
   old-locale-1.0.0.7
   old-time-1.1.0.3
   parsec-3.1.8
   pretty-1.1.2.0
   process-1.2.2.0
   random-1.0.1.1
   rts-1.0
   stm-2.4.2
   syb-0.4.4
   template-haskell-2.10.0.0
   terminfo-0.4.0.1
   text-1.2.0.4
   th-desugar-1.5
   th-lift-0.7
   time-1.5.0.1
   transformers-0.4.2.0
   unix-2.7.1.0
   xhtml-3000.2.1
   zlib-0.5.4.2

I updated only those packages (from their versions in Haskell Platform) that would not compile with 7.101-rc2.

I am setting this to highest as this issue would be very annoying for everyone.