diff --git a/src/applyPatches.ts b/src/applyPatches.ts
index 4d3d2798..37b3c189 100644
--- a/src/applyPatches.ts
+++ b/src/applyPatches.ts
@@ -51,11 +51,15 @@ function getInstalledPackageVersion({
   return semver.valid(version)
 }
 
-export function applyPatchesForApp(
-  appPath: string,
-  reverse: boolean,
-  patchDir: string,
-): void {
+export function applyPatchesForApp({
+  appPath,
+  reverse,
+  patchDir,
+}: {
+  appPath: string
+  reverse: boolean
+  patchDir: string
+}): void {
   const patchesDirectory = join(appPath, patchDir)
   const files = findPatchFiles(patchesDirectory)
 
diff --git a/src/index.ts b/src/index.ts
index fd4f67ed..ae7bb733 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -35,10 +35,6 @@ if (argv.version || argv.v) {
 } else if (argv.help || argv.h) {
   printHelp()
 } else {
-  const packageManager = detectPackageManager(
-    appPath,
-    argv["use-yarn"] ? "yarn" : null,
-  )
   const patchDir = slash(normalize((argv["patch-dir"] || "patches") + sep))
   if (patchDir.startsWith("/")) {
     throw new Error("--patch-dir must be a relative path")
@@ -56,7 +52,10 @@ if (argv.version || argv.v) {
       /package\.json$/,
       argv["case-sensitive-path-filtering"],
     )
-
+    const packageManager = detectPackageManager(
+      appPath,
+      argv["use-yarn"] ? "yarn" : null,
+    )
     packageNames.forEach((packagePathSpecifier: string) => {
       makePatch({
         packagePathSpecifier,
@@ -70,7 +69,7 @@ if (argv.version || argv.v) {
   } else {
     console.log("Applying patches...")
     const reverse = !!argv["reverse"]
-    applyPatchesForApp(appPath, reverse, patchDir)
+    applyPatchesForApp({ appPath, reverse, patchDir })
   }
 }