Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: llvm-tf (user goal)
rejecting: llvm-tf-3.1.0.1, llvm-tf-3.1, llvm-tf-3.0.3.3, llvm-tf-3.0.3.2,
llvm-tf-3.0.3.1.9, llvm-tf-3.0.3.1.8, llvm-tf-3.0.3.1.7, llvm-tf-3.0.3.1.6,
llvm-tf-3.0.3.1.5, llvm-tf-3.0.3.1.4, llvm-tf-3.0.3.1.3, llvm-tf-3.0.3.1.2,
llvm-tf-3.0.3.1.1, llvm-tf-3.0.3.1, llvm-tf-3.0.2, llvm-tf-3.0.1,
llvm-tf-3.0.0.2 (constraint from user target requires ==3.0.0.1)
trying: llvm-tf-3.0.0.1
trying: base-4.9.0.0/installed-4.9... (dependency of llvm-tf-3.0.0.1)
next goal: transformers (dependency of llvm-tf-3.0.0.1)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0,
transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0,
transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0 (conflict:
llvm-tf => transformers>=0.3 && <0.4)
rejecting: transformers-0.3.0.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.2.2.1, transformers-0.2.1.0, transformers-0.2.0.0,
transformers-0.1.4.0, transformers-0.1.3.0, transformers-0.1.1.0,
transformers-0.1.0.1, transformers-0.0.1.0, transformers-0.0.0.0,
transformers-0.5.0.2, transformers-0.4.0.0, transformers-0.2.2.0,
transformers-0.1.0.0 (conflict: llvm-tf => transformers>=0.3 && <0.4)
Dependency tree exhaustively searched.