diff --git a/build/hygiene.js b/build/hygiene.js
index 57ffde6d269e35450b5913704dab9de29175fbf6..9d6756dbc86d73d465e4e8d87b0d5188162741b7 100644
--- a/build/hygiene.js
+++ b/build/hygiene.js
@@ -202,7 +202,7 @@ function createGitIndexVinyls(paths) {
 				}
 
 				cp.exec(
-					`git show ':${relativePath}'`,
+					process.platform === 'win32' ? `git show :${relativePath}` : `git show ':${relativePath}'`,
 					{ maxBuffer: 2000 * 1024, encoding: 'buffer' },
 					(err, out) => {
 						if (err) {