Fix package-installed-p argument
Now (use-package hydra-ox :quelpa hydra)
is expanded to
(progn
(unless
(and quelpa-use-package-inhibit-loading-quelpa
(package-installed-p 'hydra-ox))
(apply 'quelpa
'(hydra)))
(require 'hydra-ox nil nil))
hydra-ox
is a elisp feature, but not a package name.
This commit fixes to use pakcage names as package-installed-p argument.