diff --git a/android/bazel.go b/android/bazel.go
index 8634dab..732419b 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -604,13 +604,6 @@
 }
 
 func bp2buildConversionMutator(ctx TopDownMutatorContext) {
-	if ctx.Config().HasBazelBuildTargetInSource(ctx) {
-		// Defer to the BUILD target. Generating an additional target would
-		// cause a BUILD file conflict.
-		ctx.MarkBp2buildUnconvertible(bp2build_metrics_proto.UnconvertedReasonType_DEFINED_IN_BUILD_FILE, "")
-		return
-	}
-
 	bModule, ok := ctx.Module().(Bazelable)
 	if !ok {
 		ctx.MarkBp2buildUnconvertible(bp2build_metrics_proto.UnconvertedReasonType_TYPE_UNSUPPORTED, "")
@@ -634,11 +627,24 @@
 		ctx.MarkBp2buildUnconvertible(bp2build_metrics_proto.UnconvertedReasonType_UNSUPPORTED, "")
 		return
 	}
+	if ctx.Module().base().GetUnconvertedReason() != nil {
+		return
+	}
+
 	bModule.ConvertWithBp2build(ctx)
 
-	if !ctx.Module().base().IsConvertedByBp2build() && ctx.Module().base().GetUnconvertedReason() == nil {
+	if len(ctx.Module().base().Bp2buildTargets()) == 0 && ctx.Module().base().GetUnconvertedReason() == nil {
 		panic(fmt.Errorf("illegal bp2build invariant: module '%s' was neither converted nor marked unconvertible", ctx.ModuleName()))
 	}
+
+	for _, targetInfo := range ctx.Module().base().Bp2buildTargets() {
+		if ctx.Config().HasBazelBuildTargetInSource(targetInfo.TargetPackage(), targetInfo.TargetName()) {
+			// Defer to the BUILD target. Generating an additional target would
+			// cause a BUILD file conflict.
+			ctx.MarkBp2buildUnconvertible(bp2build_metrics_proto.UnconvertedReasonType_DEFINED_IN_BUILD_FILE, targetInfo.TargetName())
+			return
+		}
+	}
 }
 
 func registerApiBp2buildConversionMutator(ctx RegisterMutatorsContext) {
diff --git a/android/config.go b/android/config.go
index df282ec..f9d616d 100644
--- a/android/config.go
+++ b/android/config.go
@@ -2022,10 +2022,9 @@
 	}
 }
 
-func (c *config) HasBazelBuildTargetInSource(ctx BaseModuleContext) bool {
-	moduleName := ctx.Module().Name()
-	for _, buildTarget := range c.bazelTargetsByDir[ctx.ModuleDir()] {
-		if moduleName == buildTarget {
+func (c *config) HasBazelBuildTargetInSource(dir string, target string) bool {
+	for _, existingTarget := range c.bazelTargetsByDir[dir] {
+		if target == existingTarget {
 			return true
 		}
 	}
diff --git a/android/module.go b/android/module.go
index f48af4a..ceb54de 100644
--- a/android/module.go
+++ b/android/module.go
@@ -565,8 +565,8 @@
 	AddProperties(props ...interface{})
 	GetProperties() []interface{}
 
-	// IsConvertedByBp2build returns whether this module was converted via bp2build
-	IsConvertedByBp2build() bool
+	// If this module should not have bazel BUILD definitions generated by bp2build,
+	// GetUnconvertedReason returns a reason this is the case.
 	GetUnconvertedReason() *UnconvertedReason
 
 	// Bp2buildTargets returns the target(s) generated for Bazel via bp2build for this module
@@ -1639,35 +1639,16 @@
 }
 
 func (m *ModuleBase) addBp2buildInfo(info bp2buildInfo) {
-	reason := m.commonProperties.BazelConversionStatus.UnconvertedReason
-	if reason != nil {
-		panic(fmt.Errorf("bp2build: internal error trying to convert module '%s' marked unconvertible. Reason type %d: %s",
-			m.Name(),
-			reason.ReasonType,
-			reason.Detail))
-	}
 	m.commonProperties.BazelConversionStatus.Bp2buildInfo = append(m.commonProperties.BazelConversionStatus.Bp2buildInfo, info)
 }
 
 func (m *ModuleBase) setBp2buildUnconvertible(reasonType bp2build_metrics_proto.UnconvertedReasonType, detail string) {
-	if len(m.commonProperties.BazelConversionStatus.Bp2buildInfo) > 0 {
-		fmt.Println(m.commonProperties.BazelConversionStatus.Bp2buildInfo)
-		panic(fmt.Errorf("bp2build: internal error trying to mark converted module '%s' as unconvertible. Reason type %d: %s",
-			m.Name(),
-			reasonType,
-			detail))
-	}
 	m.commonProperties.BazelConversionStatus.UnconvertedReason = &UnconvertedReason{
 		ReasonType: int(reasonType),
 		Detail:     detail,
 	}
 }
 
-// IsConvertedByBp2build returns whether this module was converted via bp2build.
-func (m *ModuleBase) IsConvertedByBp2build() bool {
-	return len(m.commonProperties.BazelConversionStatus.Bp2buildInfo) > 0
-}
-
 func (m *ModuleBase) GetUnconvertedReason() *UnconvertedReason {
 	return m.commonProperties.BazelConversionStatus.UnconvertedReason
 }
diff --git a/bp2build/aar_conversion_test.go b/bp2build/aar_conversion_test.go
index 59aacbb..40356a1 100644
--- a/bp2build/aar_conversion_test.go
+++ b/bp2build/aar_conversion_test.go
@@ -110,7 +110,7 @@
 				"import.aar": "",
 				"dep.aar":    "",
 			},
-			StubbedBuildDefinitions: []string{"static_lib_dep", "prebuilt_static_import_dep"},
+			StubbedBuildDefinitions: []string{"static_lib_dep", "static_import_dep", "static_import_dep-neverlink"},
 			// Bazel's aar_import can only export *_import targets, so we expect
 			// only "static_import_dep" in exports, but both "static_lib_dep" and
 			// "static_import_dep" in deps
@@ -125,6 +125,7 @@
 // TODO: b/301007952 - This dep is needed because android_library_import must have aars set.
 android_library_import {
         name: "static_import_dep",
+        aars: ["import.aar"],
 }
 `,
 			ExpectedBazelTargets: []string{
diff --git a/bp2build/apex_conversion_test.go b/bp2build/apex_conversion_test.go
index 60de28c..5871d59 100644
--- a/bp2build/apex_conversion_test.go
+++ b/bp2build/apex_conversion_test.go
@@ -112,7 +112,7 @@
 }
 
 cc_binary { name: "cc_binary_1"}
-sh_binary { name: "sh_binary_2"}
+sh_binary { name: "sh_binary_2", src: "foo.sh"}
 
 apex {
 	name: "com.android.apogee",
@@ -609,7 +609,7 @@
 }
 
 cc_binary { name: "cc_binary_1" }
-sh_binary { name: "sh_binary_2" }
+sh_binary { name: "sh_binary_2", src: "foo.sh"}
 
 apex {
 	name: "com.android.apogee",
@@ -736,7 +736,7 @@
 }
 
 cc_binary { name: "cc_binary_1"}
-sh_binary { name: "sh_binary_2"}
+sh_binary { name: "sh_binary_2", src: "foo.sh"}
 
 apex_test {
 	name: "com.android.apogee",
diff --git a/bp2build/build_conversion.go b/bp2build/build_conversion.go
index 15b7766..e6941df 100644
--- a/bp2build/build_conversion.go
+++ b/bp2build/build_conversion.go
@@ -713,27 +713,32 @@
 
 		switch ctx.Mode() {
 		case Bp2Build:
-			// There are two main ways of converting a Soong module to Bazel:
-			// 1) Manually handcrafting a Bazel target and associating the module with its label
-			// 2) Automatically generating with bp2build converters
-			//
-			// bp2build converters are used for the majority of modules.
-			if b, ok := m.(android.Bazelable); ok && b.HasHandcraftedLabel() {
-				if aModule, ok := m.(android.Module); ok && aModule.IsConvertedByBp2build() {
-					panic(fmt.Errorf("module %q [%s] [%s] was both converted with bp2build and has a handcrafted label", bpCtx.ModuleName(m), moduleType, dir))
-				}
-				// Handle modules converted to handcrafted targets.
-				//
-				// Since these modules are associated with some handcrafted
-				// target in a BUILD file, we don't autoconvert them.
+			if aModule, ok := m.(android.Module); ok {
+				reason := aModule.GetUnconvertedReason()
+				if reason != nil {
+					// If this module was force-enabled, cause an error.
+					if _, ok := ctx.Config().BazelModulesForceEnabledByFlag()[m.Name()]; ok && m.Name() != "" {
+						err := fmt.Errorf("Force Enabled Module %s not converted", m.Name())
+						errs = append(errs, err)
+					}
 
-				// Log the module.
-				metrics.AddUnconvertedModule(m, moduleType, dir,
-					android.UnconvertedReason{
-						ReasonType: int(bp2build_metrics_proto.UnconvertedReasonType_DEFINED_IN_BUILD_FILE),
-					})
-			} else if aModule, ok := m.(android.Module); ok && aModule.IsConvertedByBp2build() {
+					// Log the module isn't to be converted by bp2build.
+					// TODO: b/291598248 - Log handcrafted modules differently than other unconverted modules.
+					metrics.AddUnconvertedModule(m, moduleType, dir, *reason)
+					return
+				}
+				if len(aModule.Bp2buildTargets()) == 0 {
+					panic(fmt.Errorf("illegal bp2build invariant: module '%s' was neither converted nor marked unconvertible", aModule.Name()))
+				}
+
 				// Handle modules converted to generated targets.
+				targets, targetErrs = generateBazelTargets(bpCtx, aModule)
+				errs = append(errs, targetErrs...)
+				for _, t := range targets {
+					// A module can potentially generate more than 1 Bazel
+					// target, each of a different rule class.
+					metrics.IncrementRuleClassCount(t.ruleClass)
+				}
 
 				// Log the module.
 				metrics.AddConvertedModule(aModule, moduleType, dir)
@@ -761,24 +766,6 @@
 						return
 					}
 				}
-				targets, targetErrs = generateBazelTargets(bpCtx, aModule)
-				errs = append(errs, targetErrs...)
-				for _, t := range targets {
-					// A module can potentially generate more than 1 Bazel
-					// target, each of a different rule class.
-					metrics.IncrementRuleClassCount(t.ruleClass)
-				}
-			} else if _, ok := ctx.Config().BazelModulesForceEnabledByFlag()[m.Name()]; ok && m.Name() != "" {
-				err := fmt.Errorf("Force Enabled Module %s not converted", m.Name())
-				errs = append(errs, err)
-			} else if aModule, ok := m.(android.Module); ok {
-				reason := aModule.GetUnconvertedReason()
-				if reason == nil {
-					panic(fmt.Errorf("module '%s' was neither converted nor marked unconvertible with bp2build", aModule.Name()))
-				} else {
-					metrics.AddUnconvertedModule(m, moduleType, dir, *reason)
-				}
-				return
 			} else if glib, ok := m.(*bootstrap.GoPackage); ok {
 				targets, targetErrs = generateBazelTargetsGoPackage(bpCtx, glib, nameToGoLibMap)
 				errs = append(errs, targetErrs...)
diff --git a/bp2build/build_conversion_test.go b/bp2build/build_conversion_test.go
index 329c907..afbfffa 100644
--- a/bp2build/build_conversion_test.go
+++ b/bp2build/build_conversion_test.go
@@ -1994,6 +1994,41 @@
 	})
 }
 
+func TestAlreadyPresentOneToManyBuildTarget(t *testing.T) {
+	bp := `
+	custom {
+		name: "foo",
+    one_to_many_prop: true,
+	}
+	custom {
+		name: "bar",
+	}
+	`
+	alreadyPresentBuildFile :=
+		MakeBazelTarget(
+			"custom",
+			// one_to_many_prop ensures that foo generates "foo_proto_library_deps".
+			"foo_proto_library_deps",
+			AttrNameToString{},
+		)
+	expectedBazelTargets := []string{
+		MakeBazelTarget(
+			"custom",
+			"bar",
+			AttrNameToString{},
+		),
+	}
+	registerCustomModule := func(ctx android.RegistrationContext) {
+		ctx.RegisterModuleType("custom", customModuleFactoryHostAndDevice)
+	}
+	RunBp2BuildTestCase(t, registerCustomModule, Bp2buildTestCase{
+		AlreadyExistingBuildContents: alreadyPresentBuildFile,
+		Blueprint:                    bp,
+		ExpectedBazelTargets:         expectedBazelTargets,
+		Description:                  "Not duplicating work for an already-present BUILD target (different generated name)",
+	})
+}
+
 // Verifies that if a module is defined in pkg1/Android.bp, that a target present
 // in pkg2/BUILD.bazel does not result in the module being labeled "already defined
 // in a BUILD file".
diff --git a/bp2build/cc_library_shared_conversion_test.go b/bp2build/cc_library_shared_conversion_test.go
index bdde996..6fa14e3 100644
--- a/bp2build/cc_library_shared_conversion_test.go
+++ b/bp2build/cc_library_shared_conversion_test.go
@@ -1595,7 +1595,7 @@
 		Description:                "cc_library_shared stubs",
 		ModuleTypeUnderTest:        "cc_library_shared",
 		ModuleTypeUnderTestFactory: cc.LibrarySharedFactory,
-		StubbedBuildDefinitions:    []string{"libNoStubs", "libHasApexStubs", "libHasApexAndNdkStubs"},
+		StubbedBuildDefinitions:    []string{"libNoStubs", "libHasApexStubs", "libHasApexAndNdkStubs", "libHasApexAndNdkStubs.ndk_stub_libs"},
 		Blueprint: soongCcLibrarySharedPreamble + `
 cc_library_shared {
 	name: "libUsesSdk",
@@ -1621,9 +1621,7 @@
 }
 ndk_library {
 	name: "libHasApexAndNdkStubs",
-	// TODO: b/301321658 - Stub this once existing-build-file handling can deal with
-	// modules that generate targets of a different name.
-	bazel_module: { bp2build_available: false },
+	first_version: "28",
 }
 `,
 		ExpectedBazelTargets: []string{
diff --git a/bp2build/java_binary_host_conversion_test.go b/bp2build/java_binary_host_conversion_test.go
index 7d8ab63..4271f76 100644
--- a/bp2build/java_binary_host_conversion_test.go
+++ b/bp2build/java_binary_host_conversion_test.go
@@ -114,7 +114,7 @@
 	runJavaBinaryHostTestCase(t, Bp2buildTestCase{
 		Description:             "java_binary_host with srcs, libs.",
 		Filesystem:              testFs,
-		StubbedBuildDefinitions: []string{"prebuilt_java-lib-dep-1"},
+		StubbedBuildDefinitions: []string{"java-lib-dep-1", "java-lib-dep-1-neverlink"},
 		Blueprint: `java_binary_host {
     name: "java-binary-host-libs",
     libs: ["java-lib-dep-1"],