Old build system broken

[Simon Peyton Jones]

I know we are supposed to be using Hadrian now, but is the old build system supposed to be broken?
A clean build fails with

"inplace/bin/ghc-cabal" check libraries/ghc-prim

"inplace/bin/ghc-cabal" configure libraries/ghc-prim dist-install --with-ghc="/home/simonpj/code/HEAD/inplace/bin/ghc-stage1" --with-ghc-pkg="/home/simonpj/code/HEAD/inplace/bin/ghc-pkg"  --disable-library-for-ghci --enable-library-vanilla --enable-library-for-ghci --disable-library-profiling --enable-shared --configure-option=CFLAGS="-Wall     -Werror=unused-but-set-variable -Wno-error=inline" --configure-option=LDFLAGS="  " --configure-option=CPPFLAGS="   " --gcc-options="-Wall     -Werror=unused-but-set-variable -Wno-error=inline   " --with-gcc="gcc" --with-ld="ld.gold" --with-ar="ar" --with-alex="/usr/bin/alex" --with-happy="/usr/bin/happy"

Configuring ghc-prim-0.6.1...

ghc-cabal: '/home/simonpj/code/HEAD/inplace/bin/ghc-stage1' exited with an

error:

Failed to read "target arch" value ""



libraries/ghc-prim/ghc.mk:4: recipe for target 'libraries/ghc-prim/dist-install/package-data.mk' failed

make[1]: *** [libraries/ghc-prim/dist-install/package-data.mk] Error 1

Makefile:123: recipe for target 'all' failed

make: *** [all] Error 2

simonpj at MSRC-3645512:~/code/HEAD$
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