diff --git a/java/androidmk.go b/java/androidmk.go
index d86e71f..04b328d 100644
--- a/java/androidmk.go
+++ b/java/androidmk.go
@@ -65,7 +65,7 @@
 					fmt.Fprintln(w, "LOCAL_SOONG_DEX_JAR :=", library.dexJarFile.String())
 				}
 				if len(library.dexpreopter.builtInstalled) > 0 {
-					fmt.Fprintln(w, "LOCAL_SOONG_BUILT_INSTALLED :=", strings.Join(library.dexpreopter.builtInstalled, " "))
+					fmt.Fprintln(w, "LOCAL_SOONG_BUILT_INSTALLED :=", library.dexpreopter.builtInstalled)
 				}
 				fmt.Fprintln(w, "LOCAL_SDK_VERSION :=", library.sdkVersion())
 				fmt.Fprintln(w, "LOCAL_SOONG_CLASSES_JAR :=", library.implementationAndResourcesJar.String())
@@ -166,7 +166,7 @@
 						fmt.Fprintln(w, "LOCAL_SOONG_DEX_JAR :=", binary.dexJarFile.String())
 					}
 					if len(binary.dexpreopter.builtInstalled) > 0 {
-						fmt.Fprintln(w, "LOCAL_SOONG_BUILT_INSTALLED :=", strings.Join(binary.dexpreopter.builtInstalled, " "))
+						fmt.Fprintln(w, "LOCAL_SOONG_BUILT_INSTALLED :=", binary.dexpreopter.builtInstalled)
 					}
 				},
 			},
@@ -260,7 +260,7 @@
 					fmt.Fprintln(w, "LOCAL_SOONG_JNI_LIBS_"+jniLib.target.Arch.ArchType.String(), "+=", jniLib.name)
 				}
 				if len(app.dexpreopter.builtInstalled) > 0 {
-					fmt.Fprintln(w, "LOCAL_SOONG_BUILT_INSTALLED :=", strings.Join(app.dexpreopter.builtInstalled, " "))
+					fmt.Fprintln(w, "LOCAL_SOONG_BUILT_INSTALLED :=", app.dexpreopter.builtInstalled)
 				}
 			},
 		},
diff --git a/java/dexpreopt.go b/java/dexpreopt.go
index a89731a..127deab 100644
--- a/java/dexpreopt.go
+++ b/java/dexpreopt.go
@@ -28,7 +28,7 @@
 	isTest          bool
 	isInstallable   bool
 
-	builtInstalled []string
+	builtInstalled string
 }
 
 type DexpreoptProperties struct {
@@ -196,9 +196,7 @@
 
 	dexpreoptRule.Build(pctx, ctx, "dexpreopt", "dexpreopt")
 
-	for _, install := range dexpreoptRule.Installs() {
-		d.builtInstalled = append(d.builtInstalled, install.From+":"+install.To)
-	}
+	d.builtInstalled = dexpreoptRule.Installs().String()
 
 	stripRule, err := dexpreopt.GenerateStripRule(globalConfig, dexpreoptConfig)
 	if err != nil {