Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: edge (user goal)
rejecting: edge-0.9.0.2, 0.9.0.1 (global constraint requires ==0.8.20)
trying: edge-0.8.20
trying: base-4.8.1.0/installed-4f7... (dependency of edge-0.8.20)
next goal: gloss (dependency of edge-0.8.20)
rejecting: gloss-1.9.4.1, 1.9.3.1, 1.9.2.1, 1.9.1.1, 1.8.2.2, 1.8.2.1,
1.8.1.2, 1.8.1.1, 1.8.0.1 (conflict: edge => gloss>=1.7.4.1 && <1.8)
rejecting: gloss-1.7.8.4, 1.7.8.3, 1.7.8.2, 1.7.8.1 (conflict:
base==4.8.1.0/installed-4f7..., gloss => base==4.6.*)
rejecting: gloss-1.7.7.201204.1 (conflict: base==4.8.1.0/installed-4f7...,
gloss => base==4.5.*)
rejecting: gloss-1.7.7.1, 1.7.6.6, 1.7.6.5, 1.7.6.4, 1.7.6.3, 1.7.6.2
(conflict: base => ghc-prim==0.4.0.0/installed-af1..., gloss => ghc-prim>=0.2
&& <0.4)
rejecting: gloss-1.7.6.1 (conflict: base =>
ghc-prim==0.4.0.0/installed-af1..., gloss => ghc-prim==0.3.*)
rejecting: gloss-1.7.5.2, 1.7.5.1, 1.7.4.1 (conflict: base =>
ghc-prim==0.4.0.0/installed-af1..., gloss => ghc-prim==0.2.*)
rejecting: gloss-1.7.3.1, 1.7.2.1, 1.7.1.1, 1.7.0.1, 1.6.2.1, 1.6.1.1,
1.6.0.1, 1.5.2.1, 1.5.0.2, 1.5.0.1, 1.4.0.1, 1.3.4.1, 1.3.3.1, 1.3.1.2,
1.3.0.1, 1.2.0.1, 1.2.0.0, 1.1.1.0, 1.1.0.0, 1.0.0.2, 1.0.0.1, 1.0.0.0
(conflict: edge => gloss>=1.7.4.1 && <1.8)
Dependency tree exhaustively searched.