diff --git a/kas/config.py b/kas/config.py
index 88beb44..03285ff 100644
--- a/kas/config.py
+++ b/kas/config.py
@@ -154,7 +154,7 @@ class Config:
             Returns the local.conf header
         """
         header = ''
-        for key, value in self._config.get(header_name, {}).items():
+        for key, value in sorted(self._config.get(header_name, {}).items()):
             header += '# {}\n{}\n'.format(key, value)
         return header
 
diff --git a/kas/libcmds.py b/kas/libcmds.py
index 4279ad2..052425e 100644
--- a/kas/libcmds.py
+++ b/kas/libcmds.py
@@ -184,9 +184,10 @@ class WriteConfig(Command):
             filename = config.build_dir + '/conf/bblayers.conf'
             with open(filename, 'w') as fds:
                 fds.write(config.get_bblayers_conf_header())
-                fds.write('BBLAYERS ?= " \\\n')
-                for repo in config.get_repos():
-                    fds.write(' \\\n'.join(repo.layers + ['']))
+                fds.write('BBLAYERS ?= " \\\n    ')
+                fds.write(' \\\n    '.join(
+                    sorted(layer for repo in config.get_repos()
+                           for layer in repo.layers)))
                 fds.write('"\n')
 
         def _write_local_conf(config):