diff -r 6a7dfa57d63a -r 2275425cbdee configure.ac
--- a/configure.ac	Sun Jan 29 11:42:30 2012 +0100
+++ b/configure.ac	Mon Jan 30 16:52:50 2012 +0100
@@ -307,7 +307,7 @@
         [rev_id="$( hg log -r . --template '{branch}-{node|short}\n' \
                            2>/dev/null                               \
                     || true                                          )"
-         PACKAGE_VERSION="${PACKAGE_VERSION}@${rev_id:-unknown-$( date +%Y%m%d.%H%M%S )}"
+         PACKAGE_VERSION="${PACKAGE_VERSION}+${rev_id:-unknown-$( date +%Y%m%d.%H%M%S )}"
         ])])
 # Arrange to have no / in the directory name, no need to create an
 # arbitrarily deep directory structure