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] next goal: gi-gstbase (user goal) [__0] rejecting: gi-gstbase-1.0.21 (conflict: pkg-config package gstreamer-base-1.0-any, not found in the pkg-config database) [__0] rejecting: gi-gstbase-1.0.20, gi-gstbase-1.0.19, gi-gstbase-1.0.18, gi-gstbase-1.0.16, gi-gstbase-1.0.15, gi-gstbase-1.0.14, gi-gstbase-1.0.13, gi-gstbase-1.0.12, gi-gstbase-1.0.11, gi-gstbase-1.0.10, gi-gstbase-1.0.9, gi-gstbase-1.0.8, gi-gstbase-1.0.7, gi-gstbase-1.0.6, gi-gstbase-1.0.5, gi-gstbase-1.0.4, gi-gstbase-1.0.3, gi-gstbase-1.0.2, gi-gstbase-1.0.1, gi-gstbase-0.1.6.13 (constraint from user target requires ==1.0.21) [__0] fail (backjumping, conflict set: gi-gstbase) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: gi-gstbase