diff --git a/index.js b/index.js
index 8506b4c43670dd8ddb490001f2c2a5649b11f326..af35d94765e23a4e9b46b0e332ffd37061e05968 100644
--- a/index.js
+++ b/index.js
@@ -87,7 +87,7 @@ function lifecycle (pkg, stage, wd, opts) {
           // Instead, we use the path to the exe file.
           env.npm_execpath = process.execPath
         } else {
-          env.npm_execpath = require.main ? require.main.filename : process.cwd()
+          env.npm_execpath = process.argv[1] ?? process.cwd()
         }
         env.INIT_CWD = process.cwd()
         env.npm_config_node_gyp = env.npm_config_node_gyp || DEFAULT_NODE_GYP_PATH