Sorry to bother you about this but I'm having lots of trouble installing.
Two different problems in fact.
cabal install fails on resolving the marked-text dependency, in fact, Google can't find a trace of a haskell library with that kind of name.
cabal: Could not resolve dependencies:
trying: diagrams-ghci-0.1.0 (user goal)
next goal: marked-text (dependency of diagrams-ghci-0.1.0)
But even if that would succeed I yet haven't been able to install the gtk-toy-diagrams dependency:
cabal: Could not resolve dependencies:
trying: gtk-toy-diagrams-0.2.0 (user goal)
next goal: base (dependency of gtk-toy-diagrams-0.2.0)
rejecting: base-3.0.3.2, 3.0.3.1 (global constraint requires installed
instance)
trying: base-4.5.0.0/installed-40b...
trying: diagrams-core-0.6/installed-a87... (dependency of
gtk-toy-diagrams-0.2.0)
next goal: diagrams-cairo (dependency of gtk-toy-diagrams-0.2.0)
rejecting: diagrams-cairo-0.5.0.2, 0.5.0.1, 0.5 (conflict:
diagrams-core==0.6/installed-a87..., diagrams-cairo => diagrams-core>=0.5 &&
<0.6)
rejecting: diagrams-cairo-0.4 (conflict: base==4.5.0.0/installed-40b...,
diagrams-cairo => base>=4.2 && <4.5)
rejecting: diagrams-cairo-0.3, 0.2, 0.1.2, 0.1.1, 0.1 (conflict:
base==4.5.0.0/installed-40b..., diagrams-cairo => base>=4.2 && <4.4
I'm on Ubuntu using ghc 7.4. (the latest available in the Ubuntu repository)