diff --git a/apex/apex_test.go b/apex/apex_test.go
index 7ae9ed7..e130fcc 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -7235,12 +7235,13 @@
 	ensureContains(t, content, `"compression":{"uncompressed_glob":["apex_payload.img","apex_manifest.*"]}`)
 	s := mod.Rule("apexRule").Args["copy_commands"]
 	copyCmds := regexp.MustCompile(" *&& *").Split(s, -1)
-	if len(copyCmds) != 3 {
-		t.Fatalf("Expected 3 commands, got %d in:\n%s", len(copyCmds), s)
+	if len(copyCmds) != 4 {
+		t.Fatalf("Expected 4 commands, got %d in:\n%s", len(copyCmds), s)
 	}
 	ensureMatches(t, copyCmds[0], "^rm -rf .*/app/AppSet@TEST.BUILD_ID$")
 	ensureMatches(t, copyCmds[1], "^mkdir -p .*/app/AppSet@TEST.BUILD_ID$")
-	ensureMatches(t, copyCmds[2], "^unzip .*-d .*/app/AppSet@TEST.BUILD_ID .*/AppSet.zip$")
+	ensureMatches(t, copyCmds[2], "^cp -f .*/app/AppSet@TEST.BUILD_ID/AppSet.apk$")
+	ensureMatches(t, copyCmds[3], "^unzip .*-d .*/app/AppSet@TEST.BUILD_ID .*/AppSet.zip$")
 
 	// Ensure that canned_fs_config has an entry for the app set zip file
 	generateFsRule := mod.Rule("generateFsConfig")
diff --git a/apex/builder.go b/apex/builder.go
index cb09e35..ad8075b 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -459,8 +459,13 @@
 			pathOnDevice := filepath.Join("/system", fi.path())
 			copyCommands = append(copyCommands, "ln -sfn "+pathOnDevice+" "+destPath)
 		} else {
+			// Copy the file into APEX
+			copyCommands = append(copyCommands, "cp -f "+fi.builtFile.String()+" "+destPath)
+
 			var installedPath android.InstallPath
 			if fi.class == appSet {
+				// In case of AppSet, we need to copy additional APKs as well. They
+				// are zipped. So we need to unzip them.
 				copyCommands = append(copyCommands,
 					fmt.Sprintf("unzip -qDD -d %s %s", destPathDir,
 						fi.module.(*java.AndroidAppSet).PackedAdditionalOutputs().String()))
@@ -469,7 +474,6 @@
 						fi.stem(), fi.builtFile, fi.module.(*java.AndroidAppSet).PackedAdditionalOutputs())
 				}
 			} else {
-				copyCommands = append(copyCommands, "cp -f "+fi.builtFile.String()+" "+destPath)
 				if installSymbolFiles {
 					installedPath = ctx.InstallFile(pathWhenActivated.Join(ctx, fi.installDir), fi.stem(), fi.builtFile)
 				}
@@ -1086,6 +1090,9 @@
 				executablePaths = append(executablePaths, filepath.Join(f.installDir, s))
 			}
 		} else if f.class == appSet {
+			// base APK
+			readOnlyPaths = append(readOnlyPaths, pathInApex)
+			// Additional APKs
 			appSetDirs = append(appSetDirs, f.installDir)
 			appSetFiles[f.installDir] = f.module.(*java.AndroidAppSet).PackedAdditionalOutputs()
 		} else {