Comment 12 for bug 2054741

So I launched a jammy container, grabbed the source of base-files (a quick build package), and applied this change:

--- a/debian/rules
+++ b/debian/rules
@@ -12,6 +12,7 @@ VENDORFILE = ubuntu
 DESTDIR = debian/base-files

 %:
+ echo $$DEB_BUILD_PROFILES
        dh $@

 locale-check:

With dpkg 1.21.1ubuntu2.2 from jammy-updates, I did two builds:

dpkg-buildpackage -uc -us

DEB_BUILD_PROFILES=foo dpkg-buildpackage -uc -us

In both, I saw this output, as expected:
 fakeroot debian/rules clean
echo $DEB_BUILD_PROFILES
noudeb
...
 debian/rules build
echo $DEB_BUILD_PROFILES
noudeb
...
 fakeroot debian/rules binary
echo $DEB_BUILD_PROFILES
noudeb

I then installed dpkg 1.21.1ubuntu2.3 from jammy-updates, repeated the builds, but did NOT see DEB_BUILD_PROFILES set to foo:
$ apt-cache policy dpkg
dpkg:
  Installed: 1.21.1ubuntu2.3
  Candidate: 1.21.1ubuntu2.3
  Version table:
 *** 1.21.1ubuntu2.3 500
        500 http://br.archive.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
        100 /var/lib/dpkg/status

$ DEB_BUILD_PROFILES=foo dpkg-buildpackage -uc -us 2>&1 | grep -A 1 DEB_BUILD_PROFILES
echo $DEB_BUILD_PROFILES
noudeb
--
echo $DEB_BUILD_PROFILES
noudeb
--
echo $DEB_BUILD_PROFILES
noudeb

Could someone please clarify if I did something wrong? In the meantime, this is verification-failed for jammy.