diff --git a/package.go b/package.go
index 4142110..6c29090 100644
--- a/package.go
+++ b/package.go
@@ -19,7 +19,6 @@ package gore
 
 import (
 	"fmt"
-	"path/filepath"
 	"runtime/debug"
 	"sort"
 	"strings"
@@ -118,8 +117,8 @@ type PackageClassifier interface {
 func NewPathPackageClassifier(mainPkgFilepath string) *PathPackageClassifier {
 	return &PathPackageClassifier{
 		mainFilepath: mainPkgFilepath, mainFolders: []string{
-			filepath.Dir(mainPkgFilepath),
-			filepath.Clean(mainPkgFilepath),
+			osAwarePathDir(mainPkgFilepath),
+			osAwarePathClean(mainPkgFilepath),
 		},
 	}
 }
@@ -160,11 +159,11 @@ func (c *PathPackageClassifier) Classify(pkg *Package) PackageClass {
 		return ClassVendor
 	}
 
-	parentFolder := filepath.Dir(pkg.Filepath)
+	parentFolder := osAwarePathDir(pkg.Filepath)
 
 	if strings.HasPrefix(pkg.Filepath, c.mainFilepath+"/vendor/") ||
-		strings.HasPrefix(pkg.Filepath, filepath.Dir(c.mainFilepath)+"/vendor/") ||
-		strings.HasPrefix(pkg.Filepath, filepath.Dir(filepath.Dir(c.mainFilepath))+"/vendor/") {
+		strings.HasPrefix(pkg.Filepath, osAwarePathDir(c.mainFilepath)+"/vendor/") ||
+		strings.HasPrefix(pkg.Filepath, osAwarePathDir(osAwarePathDir(c.mainFilepath))+"/vendor/") {
 		return ClassVendor
 	}
 
@@ -188,11 +187,11 @@ func (c *PathPackageClassifier) Classify(pkg *Package) PackageClass {
 
 	// If the path does not contain the "vendor" in a path but has the main package folder name, assume part of main.
 	if !strings.Contains(pkg.Filepath, "vendor/") &&
-		(filepath.Base(filepath.Dir(pkg.Filepath)) == filepath.Base(c.mainFilepath)) {
+		(osAwarePathBase(osAwarePathDir(pkg.Filepath)) == osAwarePathBase(c.mainFilepath)) {
 		return ClassMain
 	}
 	// Special case for entry point package.
-	if pkg.Name == "" && filepath.Base(pkg.Filepath) == "runtime" {
+	if pkg.Name == "" && osAwarePathBase(pkg.Filepath) == "runtime" {
 		return ClassSTD
 	}
 
diff --git a/utils.go b/utils.go
index 96e7037..a86ed38 100644
--- a/utils.go
+++ b/utils.go
@@ -14,3 +14,7 @@ func osAwarePathDir(s string) string {
 func osAwarePathBase(s string) string {
 	return filepath.Base(s)
 }
+
+func osAwarePathClean(s string) string {
+	return filepath.Clean(s)
+}
diff --git a/utils_windows.go b/utils_windows.go
index 5f33c01..d5b3719 100644
--- a/utils_windows.go
+++ b/utils_windows.go
@@ -23,3 +23,11 @@ func osAwarePathBase(s string) string {
 		return s
 	}
 }
+
+func osAwarePathClean(s string) string {
+	if strings.Contains(s, "/") {
+		return strings.ReplaceAll(filepath.Clean(s), "\\", "/")
+	} else {
+		return s
+	}
+}