Resolving dependencies...
cabal: Could not resolve dependencies:
trying: llvm-pkg-config-0.0 (user goal)
trying: process-1.2.3.0/installed-f02... (dependency of llvm-pkg-config-0.0)
next goal: Cabal (dependency of llvm-pkg-config-0.0)
rejecting: Cabal-1.22.4.0/installed-43c..., 1.22.4.0, 1.22.3.0, 1.22.2.0,
1.22.1.1, 1.22.1.0, 1.22.0.0, 1.20.0.3, 1.20.0.2, 1.20.0.1, 1.20.0.0
(conflict: llvm-pkg-config => Cabal>=1.14 && <1.20)
rejecting: Cabal-1.18.1.6 (conflict: process =>
filepath==1.4.0.0/installed-8fe..., Cabal => filepath>=1 && <1.4)
rejecting: Cabal-1.18.1.5, 1.18.1.4, 1.18.1.3, 1.18.1.2, 1.18.1.1, 1.18.1,
1.18.0 (conflict: process => deepseq==1.4.1.1/installed-8fb..., Cabal =>
deepseq>=1.3 && <1.4)
rejecting: Cabal-1.16.0.3, 1.16.0.2, 1.16.0.1, 1.16.0, 1.14.0 (conflict:
process => filepath==1.4.0.0/installed-8fe..., Cabal => filepath>=1 && <1.4)
rejecting: Cabal-1.12.0, 1.10.2.0, 1.10.1.0, 1.10.0.0, 1.8.0.6, 1.8.0.4,
1.8.0.2, 1.6.0.3, 1.6.0.2, 1.6.0.1, 1.4.0.2, 1.4.0.1, 1.4.0.0, 1.2.4.0,
1.2.3.0, 1.2.2.0, 1.2.1, 1.1.6 (conflict: llvm-pkg-config => Cabal>=1.14 &&
<1.20)
Dependency tree exhaustively searched.