diff --git a/build/build.go b/build/build.go
index 84ce7d238..d962c6395 100644
--- a/build/build.go
+++ b/build/build.go
@@ -103,7 +103,7 @@ func Import(path string, mode build.ImportMode, installSuffix string, buildTags
 
 	jsFiles, err := jsFilesFromDir(pkg.Dir)
 	if err != nil {
-		return nil,err
+		return nil, err
 	}
 
 	return &PackageData{Package: pkg, JSFiles: jsFiles}, nil
@@ -112,14 +112,14 @@ func Import(path string, mode build.ImportMode, installSuffix string, buildTags
 // ImportDir is like Import but processes the Go package found in the named
 // directory.
 func ImportDir(dir string, mode build.ImportMode) (*PackageData, error) {
-	pkg,err := build.ImportDir(dir, mode)
+	pkg, err := build.ImportDir(dir, mode)
 	if err != nil {
-		return nil,err
+		return nil, err
 	}
 
 	jsFiles, err := jsFilesFromDir(pkg.Dir)
 	if err != nil {
-		return nil,err
+		return nil, err
 	}
 
 	return &PackageData{Package: pkg, JSFiles: jsFiles}, nil