Guile's deprecation warnings

I've been hacking a bit of Guile (for embedding purposes), and somehow I got to use some deprecated functions: scm_int2num and scm_num2int. The amazing thing is that along with the result of the program, you get the following warning message:

Some deprecated features have been used.  Set the environment
variable GUILE_WARN_DEPRECATED to "detailed" and rerun the
program to get more information.  Set it to "no" to suppress
this message.

Nice, no? Let's set the variable and rerun.

`scm_int2num' is deprecated. Use scm_from_int instead.
`scm_num2int' is deprecated. Use scm_to_int instead.

These kind of things make usin guile a pleasure. Now back to embedding.