Resolving dependencies...
cabal: Could not resolve dependencies:
trying: roundtrip-xml-0.3.0.5 (user goal)
trying: blaze-builder-enumerator-0.2.1.0 (dependency of roundtrip-xml-0.3.0.5)
trying: streaming-commons-0.1.12.1 (dependency of
blaze-builder-enumerator-0.2.1.0)
trying: unix-2.7.0.1/installed-0d8... (dependency of
streaming-commons-0.1.12.1)
next goal: xml-enumerator (dependency of roundtrip-xml-0.3.0.5)
rejecting: xml-enumerator-0.4.4.1, 0.4.4, 0.4.3.2, 0.4.3.1, 0.4.2.1, 0.4.2,
0.4.1, 0.4.0, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0, 0.2.1.3, 0.2.1.2, 0.2.1.1,
0.2.1, 0.2.0.2, 0.2.0.1, 0.2.0, 0.1.3, 0.1.2.1, 0.1.1, 0.1.0.2, 0.1.0.1,
0.1.0, 0.0.1.2, 0.0.1.1, 0.0.1, 0.0.0.1, 0.0.0 (conflict: unix =>
bytestring==0.10.4.0/installed-9f4..., xml-enumerator => bytestring>=0.9 &&
<0.10)
Backjump limit reached (change with --max-backjumps).