Warning: The install command is a part of the legacy v1 style of cabal usage. Please switch to using either the new project style and the new-install command or the legacy v1-install alias as new-style projects will become the default in the next version of cabal-install. Please file a bug if you cannot replicate a working v1- use case with the new-style commands. For more information, see: https://wiki.haskell.org/Cabal/NewBuild Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: alsa-gui-0.1.0.1 (user goal) [__1] trying: wxcore-0.92.3.0 (dependency of alsa-gui) [__2] trying: wxdirect-0.92.3.0 (dependency of wxcore) [__3] next goal: process (dependency of wxdirect) [__3] rejecting: process-1.6.3.0/installed-1.6..., process-1.6.5.1, process-1.6.5.0, process-1.6.4.0, process-1.6.3.0, process-1.6.2.0, process-1.6.1.0, process-1.6.0.0, process-1.5.0.0 (conflict: wxdirect => process>=1.1 && <1.5) [__3] trying: process-1.4.3.0 [__4] next goal: directory (dependency of wxcore) [__4] rejecting: directory-1.3.3.0/installed-1.3... (conflict: process => base>=4.4 && <4.11, directory => base==4.12.0.0/installed-4.1...) [__4] trying: directory-1.3.4.0 [__5] next goal: containers (dependency of wxcore +/-splitbase) [__5] rejecting: containers-0.6.0.1/installed-0.6..., containers-0.6.2.1, containers-0.6.1.1, containers-0.6.0.1 (conflict: wxcore +/-splitbase => containers>=0.1 && <0.6) [__5] trying: containers-0.5.11.0 [__6] next goal: array (dependency of wxcore +/-splitbase) [__6] rejecting: array-0.5.3.0/installed-0.5... (conflict: process => base>=4.4 && <4.11, array => base==4.12.0.0/installed-4.1...) [__6] trying: array-0.5.3.0 [__7] next goal: base (dependency of alsa-gui) [__7] rejecting: base-4.12.0.0/installed-4.1... (conflict: process => base>=4.4 && <4.11) [__7] rejecting: base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires installed instance) [__7] fail (backjumping, conflict set: alsa-gui, base, process) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: process, wxdirect, directory, wxcore, base, containers, array, alsa-gui