--- /dev/null
+pkgname=ghc
+
+pre_upgrade() {
+ cat << EOF
+ ==> Unregistering cabalized packages...
+EOF
+ cd /usr/share/haskell/ && (for a in *; do ghc-pkg unregister --force $a &> /dev/null; done; cd - > /dev/null )
+ cat << EOF
+ ==> Done.
+EOF
+
+}
+
+post_upgrade() {
+ cat << EOF
+ ==> All cabalized and yaourt-installed packages need to be reinstalled now.
+ ==> See /usr/share/haskell/ and ghc-pkg list --user for a tentative list of affected packages.
+EOF
+}
+
+op=$1
+shift