diff --git a/android/bazel_handler.go b/android/bazel_handler.go
index f4b368b..4b1a8f4 100644
--- a/android/bazel_handler.go
+++ b/android/bazel_handler.go
@@ -92,10 +92,11 @@
 type ApexConfigKey struct {
 	WithinApex     bool
 	ApexSdkVersion string
+	ApiDomain      string
 }
 
 func (c ApexConfigKey) String() string {
-	return fmt.Sprintf("%s_%s", withinApexToString(c.WithinApex), c.ApexSdkVersion)
+	return fmt.Sprintf("%s_%s_%s", withinApexToString(c.WithinApex), c.ApexSdkVersion, c.ApiDomain)
 }
 
 func withinApexToString(withinApex bool) string {
@@ -737,6 +738,7 @@
         "@//build/bazel/rules/apex:within_apex": attr.within_apex,
         "@//build/bazel/rules/apex:min_sdk_version": attr.apex_sdk_version,
         "@//build/bazel/rules/apex:apex_name": apex_name,
+        "@//build/bazel/rules/apex:api_domain": attr.api_domain,
     }
 
     return outputs
@@ -749,6 +751,7 @@
         "@//build/bazel/rules/apex:within_apex",
         "@//build/bazel/rules/apex:min_sdk_version",
         "@//build/bazel/rules/apex:apex_name",
+        "@//build/bazel/rules/apex:api_domain",
     ],
 )
 
@@ -762,6 +765,7 @@
         "os"      : attr.string(mandatory = True),
         "within_apex" : attr.bool(default = False),
         "apex_sdk_version" : attr.string(mandatory = True),
+        "api_domain" : attr.string(mandatory = True),
         "deps"    : attr.label_list(cfg = _config_node_transition, allow_files = True),
         "_allowlist_function_transition": attr.label(default = "@bazel_tools//tools/allowlists/function_transition_allowlist"),
     },
@@ -823,6 +827,7 @@
     os = "%s",
     within_apex = %s,
     apex_sdk_version = "%s",
+    api_domain = "%s",
     deps = [%s],
     testonly = True, # Unblocks testonly deps.
 )
@@ -856,6 +861,11 @@
 		osString := configTokens[1]
 		withinApex := "False"
 		apexSdkVerString := ""
+		apiDomainString := ""
+		if osString == "android" {
+			// api domains are meaningful only for device variants
+			apiDomainString = "system"
+		}
 		targetString := fmt.Sprintf("%s_%s", osString, archString)
 		if len(configTokens) > 2 {
 			targetString += "_" + configTokens[2]
@@ -867,9 +877,13 @@
 			targetString += "_" + configTokens[3]
 			apexSdkVerString = configTokens[3]
 		}
+		if len(configTokens) > 4 {
+			apiDomainString = configTokens[4]
+			targetString += "_" + apiDomainString
+		}
 		allLabels = append(allLabels, fmt.Sprintf("\":%s\"", targetString))
 		labelsString := strings.Join(labels, ",\n            ")
-		configNodesSection += fmt.Sprintf(configNodeFormatString, targetString, archString, osString, withinApex, apexSdkVerString,
+		configNodesSection += fmt.Sprintf(configNodeFormatString, targetString, archString, osString, withinApex, apexSdkVerString, apiDomainString,
 			labelsString)
 	}
 
@@ -974,11 +988,14 @@
 
   within_apex = buildoptions.get("//build/bazel/rules/apex:within_apex")
   apex_sdk_version = buildoptions.get("//build/bazel/rules/apex:min_sdk_version")
+  api_domain = buildoptions.get("//build/bazel/rules/apex:api_domain")
 
   if within_apex:
     config_key += "|within_apex"
   if apex_sdk_version != None and len(apex_sdk_version) > 0:
     config_key += "|" + apex_sdk_version
+  if api_domain != None and len(api_domain) > 0:
+    config_key += "|" + api_domain
 
   return config_key
 
@@ -1385,6 +1402,10 @@
 		keyString += "|" + key.configKey.apexKey.ApexSdkVersion
 	}
 
+	if len(key.configKey.apexKey.ApiDomain) > 0 {
+		keyString += "|" + key.configKey.apexKey.ApiDomain
+	}
+
 	return keyString
 }
 
@@ -1403,6 +1424,7 @@
 		configKey.apexKey = ApexConfigKey{
 			WithinApex:     apexKey.WithinApex,
 			ApexSdkVersion: apexKey.ApexSdkVersion,
+			ApiDomain:      apexKey.ApiDomain,
 		}
 	}