Resolving dependencies... cabal: Could not resolve dependencies: trying: base-4.9.0.0/installed-4.9... (dependency of hirt-0.0.1.1) next goal: mwc-random (dependency of hirt-0.0.1.1) rejecting: mwc-random-0.13.5.0, mwc-random-0.13.4.0, mwc-random-0.13.3.2, mwc-random-0.13.3.1, mwc-random-0.13.3.0, mwc-random-0.13.2.2, mwc-random-0.13.2.0, mwc-random-0.13.1.2, mwc-random-0.13.1.1, mwc-random-0.13.1.0, mwc-random-0.13.0.0 (conflict: hirt => mwc-random>=0.12 && <0.13) trying: mwc-random-0.12.0.1 next goal: primitive (dependency of mwc-random-0.12.0.1) rejecting: primitive-0.6.2.0, primitive-0.6.1.0 (conflict: mwc-random => primitive<0.6) rejecting: primitive-0.5.4.0 (conflict: base==4.9.0.0/installed-4.9..., primitive => base>=4.3 && <4.9) rejecting: primitive-0.5.3.0, primitive-0.5.2.1 (conflict: base==4.9.0.0/installed-4.9..., primitive => base>=4.3 && <4.8) rejecting: primitive-0.5.1.0 (conflict: base==4.9.0.0/installed-4.9..., primitive => base>=4 && <4.8) rejecting: primitive-0.5.0.1, primitive-0.5, primitive-0.4.1, primitive-0.4.0.1, primitive-0.4, primitive-0.3.1, primitive-0.3 (conflict: base==4.9.0.0/installed-4.9..., primitive => base>=4 && <4.7) rejecting: primitive-0.2.1, primitive-0.2, primitive-0.1 (conflict: base==4.9.0.0/installed-4.9..., primitive => base>=2 && <4.7) rejecting: primitive-0.6 (conflict: mwc-random => primitive<0.6) Dependency tree exhaustively searched.