* Package:    dev-ml/astring-0.8.3
 * Repository: gentoo
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking astring-0.8.3.tbz to /var/tmp/portage/dev-ml/astring-0.8.3/work
>>> Source unpacked in /var/tmp/portage/dev-ml/astring-0.8.3/work
>>> Preparing source in /var/tmp/portage/dev-ml/astring-0.8.3/work/astring-0.8.3 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-ml/astring-0.8.3/work/astring-0.8.3 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-ml/astring-0.8.3/work/astring-0.8.3 ...
File /usr/lib64/ocaml/topkg/topkg.cma is not a bytecode object file.
File "./pkg/pkg.ml", line 1:
Error: /usr/lib64/ocaml/topkg/topkg.cmi
       is not a compiled interface for this version of OCaml.
It seems to be for an older version of OCaml.
 * ERROR: dev-ml/astring-0.8.3::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line 125:  Called src_compile
 *   environment, line 222:  Called die
 * The specific snippet of code:
 *       ocaml pkg/pkg.ml build || die
 * 
 * If you need support, post the output of `emerge --info '=dev-ml/astring-0.8.3::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-ml/astring-0.8.3::gentoo'`.
 * The complete build log is located at '/var/log/portage/dev-ml:astring-0.8.3:20201017-192638.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-ml/astring-0.8.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-ml/astring-0.8.3/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-ml/astring-0.8.3/work/astring-0.8.3'
 * S: '/var/tmp/portage/dev-ml/astring-0.8.3/work/astring-0.8.3'