diff --git a/bin/node-gyp.js b/bin/node-gyp.js
index f8317b4..7d43fed 100755
--- a/bin/node-gyp.js
+++ b/bin/node-gyp.js
@@ -78,7 +78,7 @@ async function run () {
   }
 
   try {
-    const args = await prog.commands[command.name](command.args) ?? []
+    const args = await prog.commands[command.name](command.args) || []
 
     if (command.name === 'list') {
       if (args.length) {
diff --git a/lib/log.js b/lib/log.js
index 2887abb..4ddc505 100644
--- a/lib/log.js
+++ b/lib/log.js
@@ -89,15 +89,15 @@ class Logger {
   }
 
   get level () {
-    return this.#levels.get(this.#level) ?? null
+    return this.#levels.get(this.#level) || null
   }
 
   set level (level) {
-    this.#level = this.#levels.get(level)?.id ?? null
+    this.#level = this.#levels.get(level)?.id || null
   }
 
   isVisible (level) {
-    return this.level?.index <= this.#levels.get(level)?.index ?? -1
+    return this.level?.index <= this.#levels.get(level)?.index || -1
   }
 
   #onLog (...args) {
@@ -144,7 +144,7 @@ class Logger {
 
     const prefixParts = [
       this.#color('gyp', { fg: 'white', bg: 'black' }),
-      this.#color(level.display ?? level.id, level.style)
+      this.#color(level.display || level.id, level.style)
     ]
     if (msgPrefix) {
       prefixParts.push(this.#color(msgPrefix, { fg: 'magenta' }))