Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hprotoc (user goal)
rejecting: hprotoc-2.4.0, hprotoc-2.3.1, hprotoc-2.3.0, hprotoc-2.2.0,
hprotoc-2.1.12, hprotoc-2.1.11, hprotoc-2.1.9, hprotoc-2.1.8, hprotoc-2.1.7,
hprotoc-2.1.6, hprotoc-2.1.5, hprotoc-2.1.4, hprotoc-2.1.3, hprotoc-2.1.2,
hprotoc-2.1.0, hprotoc-2.0.17, hprotoc-2.0.15, hprotoc-2.0.14, hprotoc-2.0.13,
hprotoc-2.0.12, hprotoc-2.0.11, hprotoc-2.0.10, hprotoc-2.0.9, hprotoc-2.0.7,
hprotoc-2.0.6, hprotoc-2.0.5, hprotoc-2.0.2, hprotoc-2.0.0, hprotoc-1.8.3,
hprotoc-1.8.2, hprotoc-1.8.1, hprotoc-1.8.0, hprotoc-1.7.9, hprotoc-1.7.1,
hprotoc-1.7.0, hprotoc-1.6.0 (constraint from user target requires ==1.5.1)
trying: hprotoc-1.5.1
trying: base-4.9.0.0/installed-4.9... (dependency of hprotoc-1.5.1)
next goal: haskell-src-exts (dependency of hprotoc-1.5.1)
rejecting: haskell-src-exts-1.19.1, haskell-src-exts-1.19.0,
haskell-src-exts-1.18.2, haskell-src-exts-1.18.1, haskell-src-exts-1.18.0,
haskell-src-exts-1.17.1, haskell-src-exts-1.17.0, haskell-src-exts-1.16.0.1,
haskell-src-exts-1.16.0, haskell-src-exts-1.15.0.1, haskell-src-exts-1.15.0,
haskell-src-exts-1.14.0.1, haskell-src-exts-1.14.0, haskell-src-exts-1.13.5,
haskell-src-exts-1.13.4, haskell-src-exts-1.13.3, haskell-src-exts-1.13.2,
haskell-src-exts-1.13.1, haskell-src-exts-1.13.0, haskell-src-exts-1.12.0,
haskell-src-exts-1.11.1, haskell-src-exts-1.10.2, haskell-src-exts-1.10.1,
haskell-src-exts-1.10.0, haskell-src-exts-1.9.6, haskell-src-exts-1.9.5,
haskell-src-exts-1.9.4, haskell-src-exts-1.9.3, haskell-src-exts-1.9.0,
haskell-src-exts-1.8.2, haskell-src-exts-1.8.1, haskell-src-exts-1.8.0,
haskell-src-exts-1.7.2, haskell-src-exts-1.7.1, haskell-src-exts-1.7.0,
haskell-src-exts-1.6.1, haskell-src-exts-1.6.0, haskell-src-exts-1.5.3,
haskell-src-exts-1.5.2, haskell-src-exts-1.5.1, haskell-src-exts-1.5.0,
haskell-src-exts-1.4.0, haskell-src-exts-1.3.5, haskell-src-exts-1.3.4,
haskell-src-exts-1.3.3, haskell-src-exts-1.3.2, haskell-src-exts-1.3.1,
haskell-src-exts-1.3.0, haskell-src-exts-1.2.0, haskell-src-exts-1.1.4,
haskell-src-exts-1.1.3.1, haskell-src-exts-1.1.3, haskell-src-exts-1.1.1,
haskell-src-exts-1.1.0, haskell-src-exts-1.0.1, haskell-src-exts-1.0.0,
haskell-src-exts-0.5.7, haskell-src-exts-0.5.6, haskell-src-exts-0.5.5,
haskell-src-exts-0.5.4, haskell-src-exts-0.5.3, haskell-src-exts-0.5.2
(conflict: hprotoc => haskell-src-exts==0.4.8)
rejecting: haskell-src-exts-0.4.8 (conflict: base==4.9.0.0/installed-4.9...,
haskell-src-exts => base>=4 && <4.8)
rejecting: haskell-src-exts-0.4.6, haskell-src-exts-0.4.5,
haskell-src-exts-0.4.4.1, haskell-src-exts-0.4.4, haskell-src-exts-0.4.3.1,
haskell-src-exts-0.4.3, haskell-src-exts-0.4.2, haskell-src-exts-0.4.1,
haskell-src-exts-0.3.12, haskell-src-exts-0.3.11, haskell-src-exts-0.3.10,
haskell-src-exts-0.3.9, haskell-src-exts-0.3.7, haskell-src-exts-0.3.5,
haskell-src-exts-0.3.4, haskell-src-exts-0.3.3, haskell-src-exts-0.3.2,
haskell-src-exts-0.2.1 (conflict: hprotoc => haskell-src-exts==0.4.8)
Dependency tree exhaustively searched.