Windows-friendly filepath join

manager_test.go

@@ -126,8 +126,8 @@ func TestProjectManagerInit(t *testing.T) {
 	}
 
 	// Two birds, one stone - make sure the internal ProjectManager vlist cache
-	// works by asking for the versions again, and do it through smcache to
-	// ensure its sorting works, as well.
+	// works (or at least doesn't not work) by asking for the versions again,
+	// and do it through smcache to ensure its sorting works, as well.
 	smc := &bridge{
 		sm:     sm,
 		vlists: make(map[ProjectIdentifier][]Version),

project_manager.go

@@ -6,7 +6,7 @@ import (
 	"go/build"
 	"os"
 	"os/exec"
-	"path"
+	"path/filepath"
 	"strings"
 	"sync"
 
@@ -496,7 +496,7 @@ func (r *repo) exportVersionTo(v Version, to string) error {
 	switch r.r.(type) {
 	case *vcs.GitRepo:
 		// Back up original index
-		idx, bak := path.Join(r.rpath, ".git", "index"), path.Join(r.rpath, ".git", "origindex")
+		idx, bak := filepath.Join(r.rpath, ".git", "index"), filepath.Join(r.rpath, ".git", "origindex")
 		err := os.Rename(idx, bak)
 		if err != nil {
 			return err