fix: Fix path on Windows platform

internal/archive/zip/zip.go

@@ -86,9 +86,9 @@ func (w *Writer) Add(src, dst string) (count int, length int, err error) {
 	}
 
 	for _, f := range files {
-		base := filepath.Base(src)
+		base := path.Base(src)
 		rebase := path.Join(dst, base)
-		fpath := filepath.Join(src, f.Name())
+		fpath := path.Join(src, f.Name())
 		fileCount, pathLength, err := w.Add(fpath, rebase)
 		if err != nil {
 			return 0, 0, err

internal/saucecloud/zip/archive.go

@@ -3,6 +3,7 @@ package zip
 import (
 	"fmt"
 	"os"
+	"path"
 	"path/filepath"
 	"sort"
 	"strings"
@@ -71,6 +72,11 @@ func ArchiveFiles(targetFileName string, targetDir string, sourceDir string, fil
 		if err != nil {
 			return "", err
 		}
+		// The file names added should not contain any backslashes according to the specification outlined in
+		// https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT.
+		// It's essential to adhere to this specification to ensure compatibility and
+		// proper functioning of the files across different systems and platforms.
+		rel = strings.ReplaceAll(rel, string(os.PathSeparator), "/")
 		fileCount, length, err := z.Add(f, rel)
 		if err != nil {
 			return "", err
@@ -140,7 +146,7 @@ func ArchiveNodeModules(targetDir string, sourceDir string, matcher sauceignore.
 		}
 		log.Info().Msgf("Found a total of %d related npm dependencies", len(reqs))
 		for _, v := range reqs {
-			files = append(files, filepath.Join(sourceDir, "node_modules", v))
+			files = append(files, path.Join(sourceDir, "node_modules", v))
 		}
 	}
 
@@ -150,7 +156,7 @@ func ArchiveNodeModules(targetDir string, sourceDir string, matcher sauceignore.
 		log.Warn().Msg("Adding the entire node_modules folder to the payload. " +
 			"This behavior is deprecated, not recommended and will be removed in the future. " +
 			"Please address your dependency needs via https://docs.saucelabs.com/dev/cli/saucectl/usage/use-cases/#set-npm-packages-in-configyml")
-		files = append(files, filepath.Join(sourceDir, "node_modules"))
+		files = append(files, path.Join(sourceDir, "node_modules"))
 	}
 
 	return ArchiveFiles("node_modules", targetDir, sourceDir, files, matcher)