diff --git a/poky/meta/classes-recipe/populate_sdk_ext.bbclass b/poky/meta/classes-recipe/populate_sdk_ext.bbclass
index 028d0c1..f209bec 100644
--- a/poky/meta/classes-recipe/populate_sdk_ext.bbclass
+++ b/poky/meta/classes-recipe/populate_sdk_ext.bbclass
@@ -186,12 +186,7 @@
         if os.path.exists(localconf + '.bak'):
             os.replace(localconf + '.bak', localconf)
 
-python copy_buildsystem () {
-    import re
-    import shutil
-    import glob
-    import oe.copy_buildsystem
-
+def copy_bitbake_and_layers(d, baseoutpath, derivative):
     oe_init_env_script = d.getVar('OE_INIT_ENV_SCRIPT')
 
     conf_bbpath = ''
@@ -200,13 +195,7 @@
 
     # Copy in all metadata layers + bitbake (as repositories)
     buildsystem = oe.copy_buildsystem.BuildSystem('extensible SDK', d)
-    baseoutpath = d.getVar('SDK_OUTPUT') + '/' + d.getVar('SDKPATH')
 
-    #check if custome templateconf path is set
-    use_custom_templateconf = d.getVar('SDK_CUSTOM_TEMPLATECONF')
-
-    # Determine if we're building a derivative extensible SDK (from devtool build-sdk)
-    derivative = (d.getVar('SDK_DERIVATIVE') or '') == '1'
     if derivative:
         workspace_name = 'orig-workspace'
     else:
@@ -220,17 +209,20 @@
         if os.path.exists(os.path.join(baseoutpath, relpath)):
             conf_initpath = relpath
 
-        relpath = os.path.join('layers', path, 'scripts', 'devtool')
+        relpath = os.path.join('layers', path, 'scripts', 'esdk-tools', 'devtool')
         if os.path.exists(os.path.join(baseoutpath, relpath)):
-            scriptrelpath = os.path.dirname(relpath)
+            esdk_tools_path = os.path.dirname(relpath)
 
         relpath = os.path.join('layers', path, 'meta')
         if os.path.exists(os.path.join(baseoutpath, relpath, 'lib', 'oe')):
             core_meta_subdir = relpath
 
     d.setVar('oe_init_build_env_path', conf_initpath)
-    d.setVar('scriptrelpath', scriptrelpath)
+    d.setVar('esdk_tools_path', esdk_tools_path)
 
+    return (conf_initpath, conf_bbpath, core_meta_subdir, sdkbblayers)
+
+def write_devtool_config(d, baseoutpath, conf_bbpath, conf_initpath, core_meta_subdir):
     # Write out config file for devtool
     import configparser
     config = configparser.ConfigParser()
@@ -247,10 +239,12 @@
     with open(os.path.join(baseoutpath, 'conf', 'devtool.conf'), 'w') as f:
         config.write(f)
 
+def write_unlocked_sigs(d, baseoutpath):
     unlockedsigs =  os.path.join(baseoutpath, 'conf', 'unlocked-sigs.inc')
     with open(unlockedsigs, 'w') as f:
         pass
 
+def write_bblayers_conf(d, baseoutpath, sdkbblayers):
     # Create a layer for new recipes / appends
     bbpath = d.getVar('BBPATH')
     env = os.environ.copy()
@@ -279,6 +273,9 @@
         f.write('    $' + '{SDKBASEMETAPATH}/workspace \\\n')
         f.write('    "\n')
 
+def copy_uninative(d, baseoutpath):
+    import shutil
+
     # Copy uninative tarball
     # For now this is where uninative.bbclass expects the tarball
     if bb.data.inherits_class('uninative', d):
@@ -288,6 +285,12 @@
         bb.utils.mkdirhier(uninative_outdir)
         shutil.copy(uninative_file, uninative_outdir)
 
+    return uninative_checksum
+
+def write_local_conf(d, baseoutpath, derivative, core_meta_subdir, uninative_checksum):
+    #check if custome templateconf path is set
+    use_custom_templateconf = d.getVar('SDK_CUSTOM_TEMPLATECONF')
+
     env_passthrough = (d.getVar('BB_ENV_PASSTHROUGH_ADDITIONS') or '').split()
     env_passthrough_values = {}
 
@@ -457,6 +460,9 @@
                 f.write(line)
             f.write('\n')
 
+def prepare_locked_cache(d, baseoutpath, derivative, conf_initpath):
+    import shutil
+
     # Filter the locked signatures file to just the sstate tasks we are interested in
     excluded_targets = get_sdk_install_targets(d, images_only=True)
     sigfile = d.getVar('WORKDIR') + '/locked-sigs.inc'
@@ -560,6 +566,9 @@
                 f = os.path.join(root, name)
                 os.remove(f)
 
+def write_manifest(d, baseoutpath):
+    import glob
+
     # Write manifest file
     # Note: at the moment we cannot include the env setup script here to keep
     # it updated, since it gets modified during SDK installation (see
@@ -583,6 +592,32 @@
                     continue
                 chksum = bb.utils.sha256_file(fn)
                 f.write('%s\t%s\n' % (chksum, os.path.relpath(fn, baseoutpath)))
+
+
+python copy_buildsystem () {
+    import oe.copy_buildsystem
+
+    baseoutpath = d.getVar('SDK_OUTPUT') + '/' + d.getVar('SDKPATH')
+
+    # Determine if we're building a derivative extensible SDK (from devtool build-sdk)
+    derivative = (d.getVar('SDK_DERIVATIVE') or '') == '1'
+
+    conf_initpath, conf_bbpath, core_meta_subdir, sdkbblayers = copy_bitbake_and_layers(d, baseoutpath, derivative)
+
+    write_devtool_config(d, baseoutpath, conf_bbpath, conf_initpath, core_meta_subdir)
+
+    write_unlocked_sigs(d, baseoutpath)
+
+    write_bblayers_conf(d, baseoutpath, sdkbblayers)
+
+    uninative_checksum = copy_uninative(d, baseoutpath)
+
+    write_local_conf(d, baseoutpath, derivative, core_meta_subdir, uninative_checksum)
+
+    prepare_locked_cache(d, baseoutpath, derivative, conf_initpath)
+
+    write_manifest(d, baseoutpath)
+
 }
 
 def get_current_buildtools(d):
@@ -627,21 +662,6 @@
     return ' '.join(sanity_required_utilities)
 
 install_tools() {
-	install -d ${SDK_OUTPUT}/${SDKPATHNATIVE}${bindir_nativesdk}
-	scripts="devtool recipetool oe-find-native-sysroot runqemu* wic"
-	for script in $scripts; do
-		for scriptfn in `find ${SDK_OUTPUT}/${SDKPATH}/${scriptrelpath} -maxdepth 1 -executable -name "$script"`; do
-			targetscriptfn="${SDK_OUTPUT}/${SDKPATHNATIVE}${bindir_nativesdk}/$(basename $scriptfn)"
-			test -e ${targetscriptfn} || ln -rs ${scriptfn} ${targetscriptfn}
-		done
-	done
-	# We can't use the same method as above because files in the sysroot won't exist at this point
-	# (they get populated from sstate on installation)
-	unfsd_path="${SDK_OUTPUT}/${SDKPATHNATIVE}${bindir_nativesdk}/unfsd"
-	if [ "${SDK_INCLUDE_TOOLCHAIN}" = "1" -a ! -e $unfsd_path ] ; then
-		binrelpath=${@os.path.relpath(d.getVar('STAGING_BINDIR_NATIVE'), d.getVar('TMPDIR'))}
-		ln -rs ${SDK_OUTPUT}/${SDKPATH}/tmp/$binrelpath/unfsd $unfsd_path
-	fi
 	touch ${SDK_OUTPUT}/${SDKPATH}/.devtoolbase
 
 	# find latest buildtools-tarball and install it
@@ -720,7 +740,7 @@
 
 	# A bit of another hack, but we need this in the path only for devtool
 	# so put it at the end of $PATH.
-	echo "export PATH=\"$target_sdk_dir/sysroots/${SDK_SYS}${bindir_nativesdk}:\$PATH\"" >> $env_setup_script
+	echo "export PATH=\"$target_sdk_dir/${esdk_tools_path}:\$PATH\"" >> $env_setup_script
 
 	echo "printf 'SDK environment now set up; additionally you may now run devtool to perform development tasks.\nRun devtool --help for further details.\n'" >> $env_setup_script