diff --git a/common/recipes-phosphor/settings/phosphor-settings.bb b/common/recipes-phosphor/settings/phosphor-settings.bb
index 686f3c0..d03eca8 100644
--- a/common/recipes-phosphor/settings/phosphor-settings.bb
+++ b/common/recipes-phosphor/settings/phosphor-settings.bb
@@ -7,6 +7,7 @@
 inherit obmc-phosphor-license
 inherit setuptools
 inherit obmc-phosphor-dbus-service
+inherit pythonnative
 
 DBUS_SERVICE_${PN} = "org.openbmc.settings.Host.service"
 
@@ -16,7 +17,35 @@
 RPROVIDES_${PN} += "virtual-obmc-settings-mgmt"
 
 SRC_URI += "git://github.com/openbmc/phosphor-settingsd"
+SRC_URI += "file://merge_settings.py"
 
 SRCREV = "3b8d055ca761a68c74dad01a306f238674d71878"
 
 S = "${WORKDIR}/git"
+
+# Collect files in SRC_URI that end in ".override.yml" and call a script that
+# writes their contents over that of settings.yaml, which is then updated to
+# the merged data values.
+# This doesn't correctly handle globs in ".override.yml" entries in SRC_URI.
+python do_merge_settings () {
+    import subprocess
+
+    # TODO: Perform the merge in a temporary directory?
+    workdir = d.getVar('WORKDIR', True)
+    cmd = []
+    cmd.append(os.path.join(workdir, 'merge_settings.py'))
+    cmd.append(os.path.join(d.getVar('S', True), 'settings.yaml'))
+
+    fetch = bb.fetch2.Fetch([], d)
+    override_urls = filter(lambda f: f.endswith('.override.yml'), fetch.urls)
+    for url in override_urls:
+        bb.debug(2, 'Overriding with source: ' + url)
+        local_base = os.path.basename(fetch.localpath(url))
+        filename = os.path.join(workdir, local_base)
+        cmd.append(filename)
+
+    # Invoke the script and don't catch any resulting exception.
+    subprocess.check_call(cmd)
+}
+# python-pyyaml-native is installed by do_configure, so put this task after
+addtask merge_settings after do_configure before do_compile
diff --git a/common/recipes-phosphor/settings/phosphor-settings/merge_settings.py b/common/recipes-phosphor/settings/phosphor-settings/merge_settings.py
new file mode 100755
index 0000000..01f5e35
--- /dev/null
+++ b/common/recipes-phosphor/settings/phosphor-settings/merge_settings.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+"""Loads a "target" YAML file and overwrites its values with values from
+"override" YAML files.
+
+Override files are processed in the order given.
+
+Usage:
+    merge_settings.py <target yaml> [override yamls]
+"""
+import sys
+import yaml
+import copy
+
+def dict_merge(target, source):
+    """Deep merge for dicts.
+
+    Works like dict.update() that recursively updates any dict values present in
+    both parameters.
+
+    Args:
+        target (dict): Values to be overwritten by corresponding values from
+            `source`.
+        source (dict): Overriding values. Not changed by call.
+
+    Returns:
+        `target` with values overwritten from those in `source` at any and all
+        levels of nested dicts.
+    """
+    if not isinstance(source, dict):
+        return source
+    for k, v in source.iteritems():
+        if k in target and isinstance(target[k], dict):
+            dict_merge(target[k], v)
+        else:
+            target[k] = copy.deepcopy(v)
+    return target
+
+if len(sys.argv) < 2:
+    sys.exit('Argument required: target yaml')
+
+if len(sys.argv) == 2:
+    # No overrides to handle
+    sys.exit()
+
+target_filename = sys.argv[1]
+with open(target_filename) as target_file:
+    data = yaml.safe_load(target_file)
+    print('Loaded target YAML file ' + target_filename)
+
+for override_filename in sys.argv[2:]:
+    with open(override_filename) as override_file:
+        override = yaml.safe_load(override_file)
+        dict_merge(data, override)
+        print('Merged override YAML file ' + override_filename)
+
+with open(target_filename, 'w') as target_file:
+    yaml.dump(data, target_file)
+    print('Wrote merged target YAML file ' + target_filename)