As of 0.9.0+, only the search paths of packages explicitly in the profile are shown by ‘--search-paths’ and similar. This is a problem for libraries that have associated environment variables.
For instance, if one installs an application linked against OpenSSL, they will not know about ‘SSL_CERT_DIR’ and ‘SSL_CERT_FILE’. Similarly for GStreamer and ‘GST_PLUGIN_PATH’, libc and ‘GUIX_LOCPATH’, and so on. Fixing it seems tricky. We could pass the profile builder the closure’s graph (via #:references-graph) and the the set of search paths of all the direct and indirect dependencies of the profile. The builder would then need to somehow determine the subset of these search paths that is actually useful, and use it to build the search path spec in the manifest as well as etc/profile. Ludo’.
