Resolving dependencies... cabal: Could not resolve dependencies: next goal: ffmpeg-light (user goal) rejecting: ffmpeg-light-0.8.2, 0.8.1, 0.8, 0.7.1.1, 0.7.1, 0.7, 0.6, 0.5, 0.4, 0.3.1, 0.3.0.1, 0.3, 0.2.0.1, 0.2, 0.1.0.1 (global constraint requires ==0.1.0.0) trying: ffmpeg-light-0.1.0.0 trying: base-4.8.1.0/installed-4f7... (dependency of ffmpeg-light-0.1.0.0) next goal: JuicyPixels (dependency of ffmpeg-light-0.1.0.0) rejecting: JuicyPixels-3.2.6.2, 3.2.6.1, 3.2.6, 3.2.5.3, 3.2.5.2, 3.2.5.1, 3.2.5, 3.2.4, 3.2.3.2, 3.2.3.1, 3.2.3, 3.2.2, 3.2.1, 3.2 (conflict: ffmpeg-light => JuicyPixels>=3.1 && <3.2) trying: JuicyPixels-3.1.7.1 next goal: containers (dependency of JuicyPixels-3.1.7.1) rejecting: containers-0.5.6.2/installed-2de... (conflict: containers => deepseq==1.4.1.1/installed-8fb..., JuicyPixels => deepseq>=1.1 && <1.4) trying: containers-0.5.6.3 trying: array-0.5.1.0/installed-d42... (dependency of containers-0.5.6.3) next goal: deepseq (dependency of JuicyPixels-3.1.7.1) rejecting: deepseq-1.4.1.1/installed-8fb..., 1.4.1.2, 1.4.1.1, 1.4.1.0, 1.4.0.0 (conflict: JuicyPixels => deepseq>=1.1 && <1.4) rejecting: deepseq-1.3.0.2 (conflict: base==4.8.1.0/installed-4f7..., deepseq => base>=4.3 && <4.8) rejecting: deepseq-1.3.0.1, 1.3.0.0 (conflict: array==0.5.1.0/installed-d42..., deepseq => array>=0.1 && <0.5) rejecting: deepseq-1.2.0.1 (conflict: array==0.5.1.0/installed-d42..., deepseq => array>=0.1 && <0.4) rejecting: deepseq-1.2.0.0 (conflict: base==4.8.1.0/installed-4f7..., deepseq => base>=3 && <4.4) rejecting: deepseq-1.1.0.2, 1.1.0.1, 1.1.0.0 (conflict: containers => deepseq>=1.2 && <1.5) rejecting: deepseq-1.0.0.0 (conflict: JuicyPixels => deepseq>=1.1 && <1.4) Dependency tree exhaustively searched.