Resolving dependencies... cabal: Could not resolve dependencies: next goal: stylish-haskell (user goal) rejecting: stylish-haskell-0.5.14.4, 0.5.14.3, 0.5.14.2, 0.5.14.1, 0.5.14.0, 0.5.13.0, 0.5.12.0, 0.5.11.2, 0.5.11.1, 0.5.11.0, 0.5.10.2, 0.5.10.1, 0.5.10.0, 0.5.9.1, 0.5.9.0, 0.5.8.0, 0.5.7.0, 0.5.6.1, 0.5.6.0, 0.5.5.2, 0.5.5.1, 0.5.5.0, 0.5.4.0, 0.5.3.0, 0.5.2.0, 0.5.1.0, 0.5.0.2, 0.5.0.1, 0.5.0.0, 0.4.0.0, 0.3.2.0, 0.3.1.0, 0.3.0.0, 0.2.0.2, 0.2.0.1, 0.2.0.0 (global constraint requires ==0.1.1.0) trying: stylish-haskell-0.1.1.0 trying: base-4.8.1.0/installed-4f7... (dependency of stylish-haskell-0.1.1.0) next goal: haskell-src-exts (dependency of stylish-haskell-0.1.1.0) rejecting: haskell-src-exts-1.17.0, 1.16.0.1, 1.16.0, 1.15.0.1, 1.15.0, 1.14.0.1, 1.14.0 (conflict: stylish-haskell => haskell-src-exts>=1.13 && <1.14) trying: haskell-src-exts-1.13.5 rejecting: haskell-src-exts-1.13.5:+base4 (conflict: base==4.8.1.0/installed-4f7..., haskell-src-exts-1.13.5:base4 => base>=4 && <4.8) rejecting: haskell-src-exts-1.13.5:-base4 (conflict: base==4.8.1.0/installed-4f7..., haskell-src-exts-1.13.5:base4 => base>=3 && <4) Dependency tree exhaustively searched.