diff --git a/import-layers/yocto-poky/meta/classes/base.bbclass b/import-layers/yocto-poky/meta/classes/base.bbclass
index bd0d6e3..bb1f4b7 100644
--- a/import-layers/yocto-poky/meta/classes/base.bbclass
+++ b/import-layers/yocto-poky/meta/classes/base.bbclass
@@ -152,12 +152,8 @@
 addtask unpack after do_fetch
 do_unpack[dirs] = "${WORKDIR}"
 
-python () {
-    if d.getVar('S') != d.getVar('WORKDIR'):
-        d.setVarFlag('do_unpack', 'cleandirs', '${S}')
-    else:
-        d.setVarFlag('do_unpack', 'cleandirs', os.path.join('${S}', 'patches'))
-}
+do_unpack[cleandirs] = "${@d.getVar('S') if d.getVar('S') != d.getVar('WORKDIR') else os.path.join('${S}', 'patches')}"
+
 python base_do_unpack() {
     src_uri = (d.getVar('SRC_URI') or "").split()
     if len(src_uri) == 0:
@@ -170,12 +166,6 @@
         bb.fatal(str(e))
 }
 
-def pkgarch_mapping(d):
-    # Compatibility mappings of TUNE_PKGARCH (opt in)
-    if d.getVar("PKGARCHCOMPAT_ARMV7A"):
-        if d.getVar("TUNE_PKGARCH") == "armv7a-vfp-neon":
-            d.setVar("TUNE_PKGARCH", "armv7a")
-
 def get_layers_branch_rev(d):
     layers = (d.getVar("BBLAYERS") or "").split()
     layers_branch_rev = ["%-20s = \"%s:%s\"" % (os.path.basename(i), \
@@ -225,12 +215,9 @@
     import bb.runqueue
 
     if isinstance(e, bb.event.ConfigParsed):
-        if not e.data.getVar("NATIVELSBSTRING", False):
-            e.data.setVar("NATIVELSBSTRING", lsb_distro_identifier(e.data))
-        e.data.setVar('BB_VERSION', bb.__version__)
-        pkgarch_mapping(e.data)
-        oe.utils.features_backfill("DISTRO_FEATURES", e.data)
-        oe.utils.features_backfill("MACHINE_FEATURES", e.data)
+        if not d.getVar("NATIVELSBSTRING", False):
+            d.setVar("NATIVELSBSTRING", lsb_distro_identifier(d))
+        d.setVar('BB_VERSION', bb.__version__)
         # Works with the line in layer.conf which changes PATH to point here
         setup_hosttools_dir(d.getVar('HOSTTOOLS_DIR'), 'HOSTTOOLS', d)
         setup_hosttools_dir(d.getVar('HOSTTOOLS_DIR'), 'HOSTTOOLS_NONFATAL', d, fatal=False)
@@ -246,7 +233,7 @@
         e.mcdata[''].setVar("SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS", deps)
 
     if isinstance(e, bb.event.BuildStarted):
-        localdata = bb.data.createCopy(e.data)
+        localdata = bb.data.createCopy(d)
         statuslines = []
         for func in oe.data.typed_value('BUILDCFG_FUNCS', localdata):
             g = globals()
@@ -257,7 +244,7 @@
                 if flines:
                     statuslines.extend(flines)
 
-        statusheader = e.data.getVar('BUILDCFG_HEADER')
+        statusheader = d.getVar('BUILDCFG_HEADER')
         if statusheader:
             bb.plain('\n%s\n%s\n' % (statusheader, '\n'.join(statuslines)))
 
@@ -265,23 +252,23 @@
     # target ones and we'd see dulpicate key names overwriting each other
     # for various PREFERRED_PROVIDERS
     if isinstance(e, bb.event.RecipePreFinalise):
-        if e.data.getVar("TARGET_PREFIX") == e.data.getVar("SDK_PREFIX"):
-            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}binutils")
-            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc-initial")
-            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc")
-            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}g++")
-            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}compilerlibs")
+        if d.getVar("TARGET_PREFIX") == d.getVar("SDK_PREFIX"):
+            d.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}binutils")
+            d.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc-initial")
+            d.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc")
+            d.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}g++")
+            d.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}compilerlibs")
 
     if isinstance(e, bb.runqueue.sceneQueueComplete):
-        completions = e.data.expand("${STAGING_DIR}/sstatecompletions")
+        completions = d.expand("${STAGING_DIR}/sstatecompletions")
         if os.path.exists(completions):
             cmds = set()
             with open(completions, "r") as f:
                 cmds = set(f)
-            e.data.setVar("completion_function", "\n".join(cmds))
-            e.data.setVarFlag("completion_function", "func", "1")
+            d.setVar("completion_function", "\n".join(cmds))
+            d.setVarFlag("completion_function", "func", "1")
             bb.debug(1, "Executing SceneQueue Completion commands: %s" % "\n".join(cmds))
-            bb.build.exec_func("completion_function", e.data)
+            bb.build.exec_func("completion_function", d)
             os.remove(completions)
 
     if isinstance(e, bb.event.RecipeParsed):
@@ -300,7 +287,7 @@
                 if p.startswith("virtual/") and p not in multiwhitelist:
                     profprov = d.getVar("PREFERRED_PROVIDER_" + p)
                     if profprov and pn != profprov:
-                        raise bb.parse.SkipPackage("PREFERRED_PROVIDER_%s set to %s, not %s" % (p, profprov, pn))
+                        raise bb.parse.SkipRecipe("PREFERRED_PROVIDER_%s set to %s, not %s" % (p, profprov, pn))
 }
 
 CONFIGURESTAMPFILE = "${WORKDIR}/configure.sstate"
@@ -389,6 +376,10 @@
 python () {
     import string, re
 
+    # Handle backfilling
+    oe.utils.features_backfill("DISTRO_FEATURES", d)
+    oe.utils.features_backfill("MACHINE_FEATURES", d)
+
     # Handle PACKAGECONFIG
     #
     # These take the form:
@@ -463,7 +454,7 @@
 
     pn = d.getVar('PN')
     license = d.getVar('LICENSE')
-    if license == "INVALID":
+    if license == "INVALID" and pn != "defaultpkgname":
         bb.fatal('This recipe does not have the LICENSE field set (%s)' % pn)
 
     if bb.data.inherits_class('license', d):
@@ -472,7 +463,7 @@
         if unmatched_license_flag:
             bb.debug(1, "Skipping %s because it has a restricted license not"
                  " whitelisted in LICENSE_FLAGS_WHITELIST" % pn)
-            raise bb.parse.SkipPackage("because it has a restricted license not"
+            raise bb.parse.SkipRecipe("because it has a restricted license not"
                  " whitelisted in LICENSE_FLAGS_WHITELIST")
 
     # If we're building a target package we need to use fakeroot (pseudo)
@@ -500,7 +491,7 @@
             if re.match(need_machine, m):
                 break
         else:
-            raise bb.parse.SkipPackage("incompatible with machine %s (not in COMPATIBLE_MACHINE)" % d.getVar('MACHINE'))
+            raise bb.parse.SkipRecipe("incompatible with machine %s (not in COMPATIBLE_MACHINE)" % d.getVar('MACHINE'))
 
     source_mirror_fetch = d.getVar('SOURCE_MIRROR_FETCH', False)
     if not source_mirror_fetch:
@@ -509,7 +500,7 @@
             import re
             this_host = d.getVar('HOST_SYS')
             if not re.match(need_host, this_host):
-                raise bb.parse.SkipPackage("incompatible with host %s (not in COMPATIBLE_HOST)" % this_host)
+                raise bb.parse.SkipRecipe("incompatible with host %s (not in COMPATIBLE_HOST)" % this_host)
 
         bad_licenses = (d.getVar('INCOMPATIBLE_LICENSE') or "").split()
 
@@ -562,7 +553,7 @@
                         bb.debug(1, "INCLUDING the package " + pkg)
                 elif all_skipped or incompatible_license(d, bad_licenses):
                     bb.debug(1, "SKIPPING recipe %s because it's %s" % (pn, license))
-                    raise bb.parse.SkipPackage("it has an incompatible license: %s" % license)
+                    raise bb.parse.SkipRecipe("it has an incompatible license: %s" % license)
             elif pn in whitelist:
                 if pn in incompatwl:
                     bb.note("INCLUDING " + pn + " as buildable despite INCOMPATIBLE_LICENSE because it has been whitelisted")
@@ -635,6 +626,10 @@
         elif path.endswith('.rpm'):
             d.appendVarFlag('do_unpack', 'depends', ' xz-native:do_populate_sysroot')
 
+        # *.deb should DEPEND on xz-native for unpacking
+        elif path.endswith('.deb'):
+            d.appendVarFlag('do_unpack', 'depends', ' xz-native:do_populate_sysroot')
+
     if needsrcrev:
         d.setVar("SRCPV", "${@bb.fetch2.get_srcrev(d)}")