diff --git a/poky/scripts/lib/devtool/build_image.py b/poky/scripts/lib/devtool/build_image.py
index 9388abb..980f90d 100644
--- a/poky/scripts/lib/devtool/build_image.py
+++ b/poky/scripts/lib/devtool/build_image.py
@@ -113,7 +113,7 @@
                 with open(appendfile, 'w') as afile:
                     if packages:
                         # include packages from workspace recipes into the image
-                        afile.write('IMAGE_INSTALL_append = " %s"\n' % ' '.join(packages))
+                        afile.write('IMAGE_INSTALL:append = " %s"\n' % ' '.join(packages))
                         if not task:
                             logger.info('Building image %s with the following '
                                         'additional packages: %s', image, ' '.join(packages))
diff --git a/poky/scripts/lib/devtool/sdk.py b/poky/scripts/lib/devtool/sdk.py
index 3aa42a1..ae3fc4c 100644
--- a/poky/scripts/lib/devtool/sdk.py
+++ b/poky/scripts/lib/devtool/sdk.py
@@ -207,7 +207,7 @@
         if not sstate_mirrors:
             with open(os.path.join(conf_dir, 'site.conf'), 'a') as f:
                 f.write('SCONF_VERSION = "%s"\n' % site_conf_version)
-                f.write('SSTATE_MIRRORS_append = " file://.* %s/sstate-cache/PATH \\n "\n' % updateserver)
+                f.write('SSTATE_MIRRORS:append = " file://.* %s/sstate-cache/PATH \\n "\n' % updateserver)
     finally:
         shutil.rmtree(tmpsdk_dir)
 
diff --git a/poky/scripts/lib/devtool/search.py b/poky/scripts/lib/devtool/search.py
index d24040d..d81cdd8 100644
--- a/poky/scripts/lib/devtool/search.py
+++ b/poky/scripts/lib/devtool/search.py
@@ -65,7 +65,7 @@
                                         splitline = line.split(':', 1)
                                         key = splitline[0]
                                         value = splitline[1].strip()
-                                    if key in ['PKG_%s' % pkg, 'DESCRIPTION', 'FILES_INFO'] or key.startswith('FILERPROVIDES_'):
+                                    if key in ['PKG:%s' % pkg, 'DESCRIPTION', 'FILES_INFO'] or key.startswith('FILERPROVIDES_'):
                                         if keyword_rc.search(value):
                                             match = True
                                             break
diff --git a/poky/scripts/lib/devtool/standard.py b/poky/scripts/lib/devtool/standard.py
index 5eba219..b74a60d 100644
--- a/poky/scripts/lib/devtool/standard.py
+++ b/poky/scripts/lib/devtool/standard.py
@@ -254,13 +254,13 @@
                 f.write('\n# initial_rev: %s\n' % initial_rev)
 
             if args.binary:
-                f.write('do_install_append() {\n')
+                f.write('do_install:append() {\n')
                 f.write('    rm -rf ${D}/.git\n')
                 f.write('    rm -f ${D}/singletask.lock\n')
                 f.write('}\n')
 
             if bb.data.inherits_class('npm', rd):
-                f.write('python do_configure_append() {\n')
+                f.write('python do_configure:append() {\n')
                 f.write('    pkgdir = d.getVar("NPM_PACKAGE")\n')
                 f.write('    lockfile = os.path.join(pkgdir, "singletask.lock")\n')
                 f.write('    bb.utils.remove(lockfile)\n')
@@ -523,7 +523,7 @@
         history = d.varhistory.variable('SRC_URI')
         for event in history:
             if not 'flag' in event:
-                if event['op'].startswith(('_append[', '_prepend[')):
+                if event['op'].startswith((':append[', ':prepend[')):
                     extra_overrides.append(event['op'].split('[')[1].split(']')[0])
         # We want to remove duplicate overrides. If a recipe had multiple
         # SRC_URI_override += values it would cause mulitple instances of
@@ -936,36 +936,36 @@
 
         bb.utils.mkdirhier(os.path.dirname(appendfile))
         with open(appendfile, 'w') as f:
-            f.write('FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"\n')
+            f.write('FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"\n')
             # Local files can be modified/tracked in separate subdir under srctree
             # Mostly useful for packages with S != WORKDIR
-            f.write('FILESPATH_prepend := "%s:"\n' %
+            f.write('FILESPATH:prepend := "%s:"\n' %
                     os.path.join(srctreebase, 'oe-local-files'))
             f.write('# srctreebase: %s\n' % srctreebase)
 
             f.write('\ninherit externalsrc\n')
             f.write('# NOTE: We use pn- overrides here to avoid affecting multiple variants in the case where the recipe uses BBCLASSEXTEND\n')
-            f.write('EXTERNALSRC_pn-%s = "%s"\n' % (pn, srctree))
+            f.write('EXTERNALSRC:pn-%s = "%s"\n' % (pn, srctree))
 
             b_is_s = use_external_build(args.same_dir, args.no_same_dir, rd)
             if b_is_s:
-                f.write('EXTERNALSRC_BUILD_pn-%s = "%s"\n' % (pn, srctree))
+                f.write('EXTERNALSRC_BUILD:pn-%s = "%s"\n' % (pn, srctree))
 
             if bb.data.inherits_class('kernel', rd):
                 f.write('SRCTREECOVEREDTASKS = "do_validate_branches do_kernel_checkout '
                         'do_fetch do_unpack do_kernel_configcheck"\n')
                 f.write('\ndo_patch[noexec] = "1"\n')
-                f.write('\ndo_configure_append() {\n'
+                f.write('\ndo_configure:append() {\n'
                         '    cp ${B}/.config ${S}/.config.baseline\n'
                         '    ln -sfT ${B}/.config ${S}/.config.new\n'
                         '}\n')
-                f.write('\ndo_kernel_configme_prepend() {\n'
+                f.write('\ndo_kernel_configme:prepend() {\n'
                         '    if [ -e ${S}/.config ]; then\n'
                         '        mv ${S}/.config ${S}/.config.old\n'
                         '    fi\n'
                         '}\n')
             if rd.getVarFlag('do_menuconfig','task'):
-                f.write('\ndo_configure_append() {\n'
+                f.write('\ndo_configure:append() {\n'
                 '    if [ ! ${DEVTOOL_DISABLE_MENUCONFIG} ]; then\n'
                 '        cp ${B}/.config ${S}/.config.baseline\n'
                 '        ln -sfT ${B}/.config ${S}/.config.new\n'
diff --git a/poky/scripts/lib/devtool/upgrade.py b/poky/scripts/lib/devtool/upgrade.py
index da1456a..826a3f9 100644
--- a/poky/scripts/lib/devtool/upgrade.py
+++ b/poky/scripts/lib/devtool/upgrade.py
@@ -103,14 +103,14 @@
     pn = d.getVar('PN')
     af = os.path.join(appendpath, '%s.bbappend' % brf)
     with open(af, 'w') as f:
-        f.write('FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"\n\n')
+        f.write('FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"\n\n')
         f.write('inherit externalsrc\n')
         f.write(('# NOTE: We use pn- overrides here to avoid affecting'
                  'multiple variants in the case where the recipe uses BBCLASSEXTEND\n'))
-        f.write('EXTERNALSRC_pn-%s = "%s"\n' % (pn, srctree))
+        f.write('EXTERNALSRC:pn-%s = "%s"\n' % (pn, srctree))
         b_is_s = use_external_build(same_dir, no_same_dir, d)
         if b_is_s:
-            f.write('EXTERNALSRC_BUILD_pn-%s = "%s"\n' % (pn, srctree))
+            f.write('EXTERNALSRC_BUILD:pn-%s = "%s"\n' % (pn, srctree))
         f.write('\n')
         if rev:
             f.write('# initial_rev: %s\n' % rev)
@@ -583,6 +583,9 @@
         logger.info('New recipe is %s' % rf)
         if license_diff:
             logger.info('License checksums have been updated in the new recipe; please refer to it for the difference between the old and the new license texts.')
+        preferred_version = rd.getVar('PREFERRED_VERSION_%s' % rd.getVar('PN'))
+        if preferred_version:
+            logger.warning('Version is pinned to %s via PREFERRED_VERSION; it may need adjustment to match the new version before any further steps are taken' % preferred_version)
     finally:
         tinfoil.shutdown()
     return 0