Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: network-protocol-xmpp-0.5.1 (user goal)
[__1] trying: transformers-0.6.1.0/installed-0.6.1.0 (dependency of
network-protocol-xmpp)
[__2] next goal: gsasl (dependency of network-protocol-xmpp)
[__2] rejecting: gsasl-0.4.0, gsasl-0.3.7, gsasl-0.3.6 (conflict: pkg-config
package libgsasl>=1.1, not found in the pkg-config database)
[__2] rejecting: gsasl-0.3.5, gsasl-0.3.4 (conflict: transformers =>
base==4.18.1.0/installed-4.18.1.0, gsasl => base>=4.0 && <4.8)
[__2] rejecting: gsasl-0.3.3 (conflict:
transformers==0.6.1.0/installed-0.6.1.0, gsasl => transformers>=0.2 && <0.3)
[__2] skipping: gsasl-0.3.2, gsasl-0.3.1, gsasl-0.3 (has the same
characteristics that caused the previous version to fail: excludes
'transformers' version 0.6.1.0)
[__2] rejecting: gsasl-0.2 (conflict: network-protocol-xmpp => gsasl>=0.3 &&
<0.6)
[__2] skipping: gsasl-0.1 (has the same characteristics that caused the
previous version to fail: excluded by constraint '>=0.3 && <0.6' from
'network-protocol-xmpp')
[__2] fail (backjumping, conflict set: gsasl, network-protocol-xmpp,
transformers)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, gsasl, network-protocol-xmpp,
transformers
Try running with --minimize-conflict-set to improve the error message.