[...]
=-=-= Installing mocml.0.1.2 =-=-=
File "/home/gour/.opam/repo/lablqt/packages/mocml.0.1.2/url", line 1, character 0-1: '#' is not a valid token.
The compilation of mocml.0.1.2 failed.
Uninstalling mocml.0.1.2:
File "/home/gour/.opam/repo/lablqt/packages/mocml.0.1.2/url", line 1, character 0-1: '#' is not a valid token.
  ocamlfind remove lablqml
  make -f Makefile.install PREFIX=/home/gour/.opam/4.01.0 MAN=/home/gour/.opam/4.01.0/man uninstall
ocamlfind: [WARNING] No such directory: /home/gour/.opam/4.01.0/lib/lablqml
make: Makefile.install: No such file or directory
make: *** No rule to make target `Makefile.install'.  Stop.

Due to some errors while processing mocml.0.1.2, the following actions will NOT be proceeded:
 - install qocamlbrowser.0.1

==== ERROR [while installing mocml.0.1.2] ====
Internal error:
  OpamTypes.Lexer_error("'#' is not a valid token")
'opam install qocamlbrowser -v' failed.