diff --git a/gourmet/backends/db.py b/gourmet/backends/db.py
index faa6a57a..7e6d2bc6 100644
--- a/gourmet/backends/db.py
+++ b/gourmet/backends/db.py
@@ -773,9 +773,11 @@ class RecData (Pluggable):
         """Return the number of rows in table that match criteria
         """
         if criteria:
-            return table.count(*make_simple_select_arg(criteria,table)).execute().fetchone()[0]
+            return sqlalchemy.select(
+                sqlalchemy.func.count(criteria)).select_from(table).scalar()
         else:
-            return table.count().execute().fetchone()[0]
+            return sqlalchemy.select(
+                sqlalchemy.func.count()).select_from(table).scalar()
 
     def fetch_join (self, table1, table2, col1, col2,
                     column_names=None, sort_by=[], **criteria):
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<div class='path'>path: <a href='/guix/log/?id=096f442d7d98246eb9d003592f68689a631fd6af'>root</a>/<a href='/guix/log/tests?id=096f442d7d98246eb9d003592f68689a631fd6af'>tests</a>/<a href='/guix/log/tests/containers.scm?id=096f442d7d98246eb9d003592f68689a631fd6af'>containers.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/containers.scm?id=096f442d7d98246eb9d003592f68689a631fd6af&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-10-15 10:21:41 +0200'>2019-10-15</span></td><td><a href='/guix/commit/tests/containers.scm?id=e464ac667297d2acf57e52438a39cadc87b95da2'>tests: Skip container test when lacking kernel support.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 96b35998e610c7fc37bf87bf9e07e63d3bebd0a3.

* tests/containers.scm ("eval/container, non-empty load path"): Add
missing 'skip-if-unsupported' call.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-09-18 23:08:28 +0200'>2019-09-18</span></td><td><a href='/guix/commit/tests/containers.scm?id=96b35998e610c7fc37bf87bf9e07e63d3bebd0a3'>linux-container: 'eval/container' correctly passes -L and -C flags.</a><span class='msg-avail'>...<span class='msg-tooltip'>This fixes a type error.

* gnu/system/linux-container.scm (eval/container): Use 'append-map', not
'map'.
* tests/containers.scm ("eval/container, non-empty load path"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-19 11:53:47 +0200'>2019-07-19</span></td><td><a href='/guix/commit/tests/containers.scm?id=bacfec8611530dc3e849fb804b51f50b299796f0'>linux-container: Add 'eval/container'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/linux-container.scm (eval/container): New procedure.
* tests/containers.scm ("eval/container, exit status")
("eval/container, writable user mapping"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-02 18:15:37 +0200'>2019-04-02</span></td><td><a href='/guix/commit/tests/containers.scm?id=af76c020bf19de5fe2e92f31d8b85cbd55c481de'>linux-container: Make the guest UID and GID a parameter.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-container.scm (initialize-user-namespace): Add
 #:guest-uid and #:guest-gid parameters and honor them.
(run-container): Likewise.
(call-with-container): Likewise.
* tests/containers.scm ("call-with-container, user namespace, guest UID/GID"):
New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-31 17:08:45 +0200'>2017-05-31</span></td><td><a href='/guix/commit/tests/containers.scm?id=3e894917414239cab1737d89feb263e0825ae7c5'>tests: Fix race condition in 'container-excursion*' test.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/containers.scm ("container-excursion*"): Move (namespace pid)
call before (kill pid SIGKILL).
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-02-07 00:08:10 +0100'>2017-02-07</span></td><td><a href='/guix/commit/tests/containers.scm?id=c90db25f4cf1f98f3f4f3af38d175a14ffb8c32a'>linux-container: Add 'container-excursion*'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-container.scm (container-excursion*): New procedure.
* tests/containers.scm ("container-excursion*")
("container-excursion*, same namespaces"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>