On Sun, Sep 27, 2009 at 9:17 PM, Paul Moore
That's odd, it seems to be saying it's not installed at all! Hmm, no - I did a cabal install --user (because Vista doesn't let me do site-wide installs), looks like cabal list doesn't pick up user installs.
Hmm, cabal install mersenne-random --user didn't do anything, but cabal install mersenne-random --user --reinstall did reinstall it, and now it seems to work.
To find out what GHC picks up automatically: $ ghc-pkg list /home/dougal/lib/ghc-6.10.3/./package.conf: Cabal-1.6.0.3, HUnit-1.2.0.3, QuickCheck-1.2.0.0, array-0.2.0.0, base-3.0.3.1, base-4.1.0.0, bytestring-0.9.1.4, containers-0.2.0.1, directory-1.0.0.3, (dph-base-0.3), (dph-par-0.3), (dph-prim-interface-0.3), (dph-prim-par-0.3), (dph-prim-seq-0.3), (dph-seq-0.3), extensible-exceptions-0.1.1.0, filepath-1.1.0.2, (ghc-6.10.3), ghc-prim-0.1.0.0, haddock-2.4.2, haskell-src-1.0.1.3, haskell98-1.0.1.0, hpc-0.5.0.3, html-1.0.1.2, integer-0.1.0.1, mtl-1.1.0.2, network-2.2.1, old-locale-1.0.0.1, old-time-1.0.0.2, packedstring-0.1.0.1, parallel-1.1.0.1, parsec-2.1.0.1, pretty-1.0.1.0, process-1.0.1.1, random-1.0.0.1, regex-base-0.72.0.2, regex-compat-0.71.0.1, regex-posix-0.72.0.3, rts-1.0, stm-2.1.1.2, syb-0.1.0.1, template-haskell-2.3.0.1, time-1.1.3, unix-2.3.2.0, xhtml-3000.2.0.1 /home/dougal/.ghc/i386-linux-6.10.3/package.conf: HTTP-4000.0.4, X11-1.4.5, X11-xft-0.3, benchpress-0.2.2.3, cairo-0.10.1, colour-2.3.0, cpphs-1.9, darcs-2.2.1, data-default-0.2, diagrams-0.2, gd-3000.4.0, gio-0.10.1, glib-0.10.1, gtk-0.10.1, hashed-storage-0.3.7, haskeline-0.6.1.6, haskell-src-exts-1.1.4, hscolour-1.15, mmap-0.4.1, soegtk-0.10.1, split-0.1.1, svgcairo-0.10.1, tagsoup-0.6, terminfo-0.2.2.1, terminfo-0.3.0.2, uniplate-1.2.0.3, utf8-string-0.3.4, xmonad-0.8.1, xmonad-contrib-0.8.1, zlib-0.5.0.0, zlib-0.5.2.0 You should get everything hanging about, installed system-wide or in your home directory. I assume this works much the same for Windows. D