bug#22706: xdg-utils xdg-open can't open any URLs

[Danny Milosavljevic]

Package: xdg-utils

After installing xdg-utils 1.0.2 and trying

  $ xdg-open http://manual.audacityteam.org/o/index.html'

I get

/home/dannym/.guix-profile/bin/xdg-open: line 306: xprop: command not found
/home/dannym/.guix-profile/bin/xdg-open: line 369: firefox: command not found
/home/dannym/.guix-profile/bin/xdg-open: line 369: mozilla: command not found
/home/dannym/.guix-profile/bin/xdg-open: line 369: netscape: command not found
xdg-open: no method available for opening 
'http://manual.audacityteam.org/o/index.html'

I've got icecat installed, though...

It's trying to use xprop in order to find out whether the property 
"_DT_SAVE_MODE" is available on the root window - which would mean that Xfce is 
running. But it didn't install it.

If a BROWSER environment variable were set, it would use that. But none is set, 
so it uses firefox:mozilla:netscape , none of which exists.