diff --git a/cl/_testlibgo/_errors/in.go b/cl/_testlibgo/errors/in.go
similarity index 100%
rename from cl/_testlibgo/_errors/in.go
rename to cl/_testlibgo/errors/in.go
diff --git a/cl/_testlibgo/errors/out.ll b/cl/_testlibgo/errors/out.ll
new file mode 100644
index 000000000..ffce31e6c
--- /dev/null
+++ b/cl/_testlibgo/errors/out.ll
@@ -0,0 +1,60 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+%"github.com/goplus/llgo/internal/runtime.iface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@0 = private unnamed_addr constant [5 x i8] c"error", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @errors.init()
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 0
+  store ptr @0, ptr %3, align 8
+  %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 1
+  store i64 5, ptr %4, align 4
+  %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
+  %6 = call %"github.com/goplus/llgo/internal/runtime.iface" @errors.New(%"github.com/goplus/llgo/internal/runtime.String" %5)
+  %7 = call ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface" %6)
+  %8 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %6, 1
+  %9 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %10 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %9, i32 0, i32 0
+  store ptr %7, ptr %10, align 8
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %9, i32 0, i32 1
+  store ptr %8, ptr %11, align 8
+  %12 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %9, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface" %12)
+  unreachable
+}
+
+declare void @errors.init()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare %"github.com/goplus/llgo/internal/runtime.iface" @errors.New(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface")
+
+declare void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface")
diff --git a/internal/build/build.go b/internal/build/build.go
index fb591d896..e7174e3ed 100644
--- a/internal/build/build.go
+++ b/internal/build/build.go
@@ -35,6 +35,7 @@ import (
 
 	"github.com/goplus/llgo/cl"
 	"github.com/goplus/llgo/internal/packages"
+	"github.com/goplus/llgo/ssa/abi"
 	"github.com/goplus/llgo/xtool/clang"
 	"github.com/goplus/llgo/xtool/env"
 
@@ -400,7 +401,7 @@ func buildPkg(ctx *context, aPkg *aPackage) {
 }
 
 const (
-	altPkgPathPrefix = "github.com/goplus/llgo/internal/lib/"
+	altPkgPathPrefix = abi.PatchPathPrefix
 )
 
 func altPkgs(initial []*packages.Package, alts ...string) []string {
diff --git a/ssa/abi/abi.go b/ssa/abi/abi.go
index 28e065b3a..25298272f 100644
--- a/ssa/abi/abi.go
+++ b/ssa/abi/abi.go
@@ -23,6 +23,7 @@ import (
 	"go/types"
 	"hash"
 	"log"
+	"strings"
 
 	"github.com/goplus/llgo/internal/abi"
 )
@@ -168,6 +169,10 @@ func (b *Builder) TypeName(t types.Type) (ret string, pub bool) {
 	return
 }
 
+const (
+	PatchPathPrefix = "github.com/goplus/llgo/internal/lib/"
+)
+
 // PathOf returns the package path of the specified package.
 func PathOf(pkg *types.Package) string {
 	if pkg == nil {
@@ -176,7 +181,7 @@ func PathOf(pkg *types.Package) string {
 	if pkg.Name() == "main" {
 		return "main"
 	}
-	return pkg.Path()
+	return strings.TrimPrefix(pkg.Path(), PatchPathPrefix)
 }
 
 // FullName returns the full name of a package member.