Search paths in packages

[Roel Janssen]

Dear Guix,

I have a question about how search paths are handled in Guix.
So, I have a package that tries to set an environment variable:
DRMAA_LIBRARY_PATH.

So, I tried:
(native-search-paths
     (list (search-path-specification
            (variable "DRMAA_LIBRARY_PATH")
            (files '("lib/libdrmaa.so")))))

But after running:
$ guix environment --container --ad-hoc <the-package> bash coreutils

... the DRMAA_LIBRARY_PATH is not set.

However, the manifest contains the search path.  From inside the container:
$ cat $GUIX_ENVIRONMENT/manifest
(manifest
  (version 3)
  (packages
    (("coreutils"
      "8.27"
      "out"
      "/gnu/store/m9l0j7apf9ac7shqwi5sh4hsn12x4dnk-coreutils-8.27"
      (propagated-inputs ())
      (search-paths ()))
     ("bash"
      "4.4.12"
      "out"
      "/gnu/store/b7y66db86k57vbb03nr4bfn9svmks4gf-bash-4.4.12"
      (propagated-inputs ())
      (search-paths
        (("BASH_LOADABLES_PATH"
          ("lib/bash")
          ":"
          directory
          #f))))
     ("grid-engine-core"
      "8.1.9"
      "out"
      "/gnu/store/jw80iilm964q2y0krnc1r67fxi07fix2-grid-engine-core-8.1.9"
      (propagated-inputs ())
      (search-paths
        (("DRMAA_LIBRARY_PATH"
          ("lib/libdrmaa.so")
          ":"
          directory
          #f)))))))

Why isn't DRMAA_LIBRARY_PATH set in this case?

Kind regards,
Roel Janssen