diff --git a/rpm/harbour-storeman.spec b/rpm/harbour-storeman.spec
index 32ebd6b6..ebd713ac 100644
--- a/rpm/harbour-storeman.spec
+++ b/rpm/harbour-storeman.spec
@@ -119,41 +119,50 @@ desktop-file-install --delete-original --dir=%{buildroot}%{_datadir}/application
 # Mind to keep these two %%post scripltets synchronised!
 # The %%post scriptlet is deliberately run when installing *and* updating:
 ssu_ur=no
-ssu_lr="$(ssu lr | grep '^ - ' | cut -f 3 -d ' ')"
-if echo "$ssu_lr" | grep -Fq mentaljam-obs
+if grep -q '^mentaljam-obs=' %{_sysconfdir}/ssu/ssu.ini
 then
   ssu rr mentaljam-obs
   ssu_ur=yes
 fi
 # Add harbour-storeman-obs repository configuration, depending on the installed
-# SailfishOS release (3.1.0 is the lowest supported, see line 35 ff.):
+# SailfishOS release (3.1.0 is the lowest supported, see line 35 ff.).
+# Set empty default value failing the following tests, because VERSION_ID
+# should become overwritten by source'ing /etc/os-release:
+VERSION_ID=''
 source %{_sysconfdir}/os-release
 sailfish_version="$(echo "$VERSION_ID" | cut -s -f 1-3 -d '.' | tr -d '.')"
-# Must be an all numerical string of at least three digits:
-if echo "$sailfish_version" | grep -q '^[0-9][0-9][0-9][0-9]*$'
+# sailfish_version must be an all numerical string of at least three digits:
+if ! echo "sailfish_version" | grep -q '^[0-9][0-9][0-9][0-9]*$'
 then
-  if [ "$sailfish_version" -lt 460 ]
-  then ssu ar %{name}-obs 'https://repo.sailfishos.org/obs/home:/olf:/%{name}/%%(release)_%%(arch)/'
-  else ssu ar %{name}-obs 'https://repo.sailfishos.org/obs/home:/olf:/%{name}/%%(releaseMajorMinor)_%%(arch)/'
+  echo "Error: VERSION_ID=$VERSION_ID => sailfish_version=$sailfish_version" >&2
+else
+  # Ensure that the repo config is correct: If it is missing or a fixed
+  # SFOS-release number was used, set it anew.
+  release_macro="$(grep '^harbour-storeman-obs=' %{_sysconfdir}/ssu/ssu.ini | grep -o '/[[:graph:]][[:graph:]][[:graph:]][[:graph:]]*/$' | grep -o '%%(release[[:alpha:]]*)')"
+  if [ $sailfish_version -ge 460 ] && [ "$release_macro" != '%%(releaseMajorMinor)' ]
+  then
+    ssu ar harbour-storeman-obs 'https://repo.sailfishos.org/obs/home:/olf:/harbour-storeman/%%(releaseMajorMinor)_%%(arch)/'
+    ssu_ur=yes
+  elif [ $sailfish_version -lt 460 ] && [ "$release_macro" != '%%(release)' ]
+  then
+    ssu ar harbour-storeman-obs 'https://repo.sailfishos.org/obs/home:/olf:/harbour-storeman/%%(release)_%%(arch)/'
+    ssu_ur=yes
   fi
-  ssu_ur=yes
-# Should be enhanced to proper debug output, also writing to systemd-journal:
-else echo "Error: VERSION_ID=$VERSION_ID => sailfish_version=$sailfish_version" >&2
 fi
 if [ $ssu_ur = yes ]
 then ssu ur
 fi
 # BTW, `ssu`, `rm -f`, `mkdir -p` etc. *always* return with "0" ("success"), hence
 # no appended `|| true` needed to satisfy `set -e` for failing commands outside of
-# flow control directives (if, while, until etc.).  Furthermore on Fedora Docs it
-# is indicated that solely the final exit status of a whole scriptlet is crucial: 
+# flow control directives (if, while, until etc.).  Furthermore Fedora Docs etc.
+# state that solely the final exit status of a whole scriptlet is crucial: 
 # See https://docs.pagure.org/packaging-guidelines/Packaging%3AScriptlets.html
 # or https://docs.fedoraproject.org/en-US/packaging-guidelines/Scriptlets/#_syntax
 # committed on 18 February 2019 by tibbs ( https://pagure.io/user/tibbs ) in
 # https://pagure.io/packaging-committee/c/8d0cec97aedc9b34658d004e3a28123f36404324
-# Hence I have the impression, that only the main section of a spec file is
-# interpreted in a shell invoked with the option `-e', but not the scriptlets
-# (`%%pre*`, `%%post*`, `%%trigger*` and `%%file*`).
+# Hence only the main section of a spec file and likely also `%%(<shell-script>)`
+# statements are executed in a shell invoked with the option `-e', but not the
+# scriptlets: `%%pre*`, `%%post*`, `%%trigger*` and `%%file*`
 exit 0
 
 %postun