failed to create path for auto-compiled file

[Matt Wette]

Hi All,

I maintain an add-on package to Guile.  I have a user reporting the following
WARNING:

;;; compiling /usr/share/guile/site/2.2/nyacc/lang/c99/ffi-help.scm
;;; WARNING: compilation of 
/usr/share/guile/site/2.2/nyacc/lang/c99/ffi-help.scm failed:
;;; failed to create path for auto-compiled file 
"/usr/share/guile/site/2.2/nyacc/lang/c99/ffi-help.scm"

So my part of my package, including the file above, depends on 
scheme-bytestructures.
If, on installation (presumably as root), bytestructures is not found, then 
only the
sources are installed.  Now it seems a user has bytestructures in his own path 
and
now he wants to use ffi-help, but it's not getting compiled.  I would expect
Guile to compile and install in the user's .cache directory if write to a 
root-owned
directory (e.g., /usr/lib/guile/2.2/site-ccache) fails.

Am I missing something?  Should this be reported as a bug?

Matt