diff --git a/go/packages/packages.go b/go/packages/packages.go
index f4aac56e..1e5836c9 100644
--- a/go/packages/packages.go
+++ b/go/packages/packages.go
@@ -19,6 +19,7 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
 	"sync"
 
 	"golang.org/x/tools/go/gcexportdata"
@@ -838,7 +839,7 @@ func sameFile(x, y string) bool {
 		// overlay case implies x==y.)
 		return true
 	}
-	if filepath.Base(x) == filepath.Base(y) { // (optimisation)
+	if strings.EqualFold(filepath.Base(x), filepath.Base(y)) { // (optimisation)
 		if xi, err := os.Stat(x); err == nil {
 			if yi, err := os.Stat(y); err == nil {
 				return os.SameFile(xi, yi)