Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: xmobar (user goal)
[__0] rejecting: xmobar-0.38, xmobar-0.37, xmobar-0.36, xmobar-0.35.1,
xmobar-0.35, xmobar-0.34, xmobar-0.33, xmobar-0.32, xmobar-0.31, xmobar-0.30,
xmobar-0.29.5, xmobar-0.29.4, xmobar-0.29.3, xmobar-0.29.2, xmobar-0.29.1,
xmobar-0.29, xmobar-0.28.1, xmobar-0.28, xmobar-0.27 (constraint from user
target requires ==0.26)
[__0] trying: xmobar-0.26
[__1] next goal: stm (dependency of xmobar)
[__1] rejecting: stm-2.5.0.0/installed-2.5.0.0 (conflict: xmobar => stm>=2.3
&& <2.5)
[__1] skipping: stm-2.5.0.1, stm-2.5.0.0 (has the same characteristics that
caused the previous version to fail: excluded by constraint '>=2.3 && <2.5'
from 'xmobar')
[__1] trying: stm-2.4.5.1
[__2] next goal: base (dependency of xmobar)
[__2] rejecting: base-4.14.1.0/installed-4.14.1.0 (conflict: stm => base>=4.3
&& <4.12)
[__2] skipping: base-4.15.0.0, base-4.14.1.0, base-4.14.0.0, base-4.13.0.0,
base-4.12.0.0 (has the same characteristics that caused the previous version
to fail: excluded by constraint '>=4.3 && <4.12' from 'stm')
[__2] rejecting: base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0,
base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
[__2] fail (backjumping, conflict set: base, stm, xmobar)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, xmobar, stm