Resolving dependencies... cabal: Could not resolve dependencies: next goal: interpolatedstring-perl6 (user goal) rejecting: interpolatedstring-perl6-1.0.0, 0.9.0, 0.8.1, 0.8 (global constraint requires ==0.6) trying: interpolatedstring-perl6-0.6 trying: base-4.8.1.0/installed-4f7... (dependency of interpolatedstring-perl6-0.6) trying: haskell-src-meta-mwotton-0.1.0 (dependency of interpolatedstring-perl6-0.6) next goal: haskell-src-exts (dependency of haskell-src-meta-mwotton-0.1.0) 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, 1.13.5, 1.13.4, 1.13.3, 1.13.2, 1.13.1, 1.13.0, 1.12.0, 1.11.1, 1.10.2, 1.10.1, 1.10.0, 1.9.6, 1.9.5, 1.9.4, 1.9.3, 1.9.0, 1.8.2, 1.8.1, 1.8.0, 1.7.2, 1.7.1, 1.7.0, 1.6.1, 1.6.0, 1.5.3, 1.5.2, 1.5.1, 1.5.0, 1.4.0, 1.3.5, 1.3.4, 1.3.3, 1.3.2, 1.3.1, 1.3.0 (conflict: haskell-src-meta-mwotton => haskell-src-exts>=1.2.0 && <1.3) trying: haskell-src-exts-1.2.0 rejecting: haskell-src-exts-1.2.0:+base4 (conflict: base==4.8.1.0/installed-4f7..., haskell-src-exts-1.2.0:base4 => base>=4 && <4.8) rejecting: haskell-src-exts-1.2.0:-base4 (conflict: base==4.8.1.0/installed-4f7..., haskell-src-exts-1.2.0:base4 => base>=3 && <4) Dependency tree exhaustively searched.