Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: edge (user goal)
rejecting: edge-0.9.1.1, edge-0.9.1.0, edge-0.9.0.2, edge-0.9.0.1,
edge-0.8.20, edge-0.8.18 (constraint from user target requires ==0.8.16)
trying: edge-0.8.16
trying: base-4.9.0.0/installed-4.9... (dependency of edge-0.8.16)
next goal: gloss (dependency of edge-0.8.16)
rejecting: gloss-1.10.2.3, gloss-1.10.2.2, gloss-1.10.2.1, gloss-1.10.1.1,
gloss-1.9.4.1, gloss-1.9.3.1, gloss-1.9.2.1, gloss-1.9.1.1, gloss-1.8.2.2,
gloss-1.8.2.1, gloss-1.8.1.2, gloss-1.8.1.1, gloss-1.8.0.1 (conflict: edge =>
gloss>=1.7.4.1 && <1.8)
rejecting: gloss-1.7.8.4, gloss-1.7.8.3, gloss-1.7.8.2, gloss-1.7.8.1
(conflict: base==4.9.0.0/installed-4.9..., gloss => base==4.6.*)
rejecting: gloss-1.7.7.201204.1 (conflict: base==4.9.0.0/installed-4.9...,
gloss => base==4.5.*)
rejecting: gloss-1.7.7.1, gloss-1.7.6.6, gloss-1.7.6.5, gloss-1.7.6.4,
gloss-1.7.6.3, gloss-1.7.6.2 (conflict: base =>
ghc-prim==0.5.0.0/installed-0.5..., gloss => ghc-prim>=0.2 && <0.4)
rejecting: gloss-1.7.6.1 (conflict: base =>
ghc-prim==0.5.0.0/installed-0.5..., gloss => ghc-prim==0.3.*)
rejecting: gloss-1.7.5.2, gloss-1.7.5.1, gloss-1.7.4.1 (conflict: base =>
ghc-prim==0.5.0.0/installed-0.5..., gloss => ghc-prim==0.2.*)
rejecting: gloss-1.7.3.1, gloss-1.7.2.1, gloss-1.7.1.1, gloss-1.7.0.1,
gloss-1.6.2.1, gloss-1.6.1.1, gloss-1.6.0.1, gloss-1.5.2.1, gloss-1.5.0.2,
gloss-1.5.0.1, gloss-1.4.0.1, gloss-1.3.4.1, gloss-1.3.3.1, gloss-1.3.1.2,
gloss-1.3.0.1, gloss-1.2.0.1, gloss-1.2.0.0, gloss-1.1.1.0, gloss-1.1.0.0,
gloss-1.0.0.2, gloss-1.0.0.1, gloss-1.0.0.0 (conflict: edge => gloss>=1.7.4.1
&& <1.8)
Dependency tree exhaustively searched.