Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hledger-web (user goal)
rejecting: hledger-web-0.27, 0.26, 0.25.1, 0.25, 0.24.1, 0.24, 0.23.3, 0.23.2,
0.23.1, 0.23, 0.22.8, 0.22.7, 0.22.6, 0.22.5, 0.22.4, 0.22.3, 0.22.2, 0.22.1,
0.22, 0.21.3, 0.21.2, 0.21.1, 0.21, 0.20.0.1, 0.20, 0.19.3, 0.19.1, 0.19,
0.18.2, 0.18.1, 0.18, 0.17.1, 0.17, 0.16.5, 0.16.4, 0.16.3, 0.16.2, 0.16.1
(global constraint requires ==0.16)
trying: hledger-web-0.16
trying: warp-3.1.9 (dependency of hledger-web-0.16)
trying: http-date-0.0.6.1 (dependency of warp-3.1.9)
trying: attoparsec-0.13.0.1 (dependency of http-date-0.0.6.1)
trying: scientific-0.3.4.2 (dependency of attoparsec-0.13.0.1)
trying: binary-0.7.5.0/installed-072... (dependency of scientific-0.3.4.2)
next goal: data-object-yaml (dependency of hledger-web-0.16)
rejecting: data-object-yaml-0.3.4.2, 0.3.4.1, 0.3.4, 0.3.3.6, 0.3.3.5,
0.3.3.4, 0.3.3.3, 0.3.3.2, 0.3.3.1, 0.3.3, 0.3.2, 0.3.1.1, 0.3.1, 0.3.0,
0.2.0.1, 0.2.0, 0.0.0 (conflict: binary =>
bytestring==0.10.6.0/installed-236..., data-object-yaml => bytestring>=0.9.1.4
&& <0.10)
Backjump limit reached (change with --max-backjumps).