Resolving dependencies...
cabal: Could not resolve dependencies:
trying: jsaddle-webkit2gtk-0.8.3.1 (dependency of
ghcjs-dom-hello-5.0.0.0:+webkit2gtk)
next goal: webkit2gtk3-javascriptcore (dependency of
jsaddle-webkit2gtk-0.8.3.1)
rejecting: webkit2gtk3-javascriptcore-0.14.2.1 (conflict: requires pkg-config
package webkit2gtk-4.0>=1.1.15, not found in the pkg-config database)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).