fix(smol): pass msvs_version as gyp generator flag

Use -G msvs_version=2022 instead of GYP_MSVS_VERSION env var.
Gyp checks generator_flags dict, not environment variables.

Author: jdalton

packages/node-smol-builder/scripts/build.mjs

@@ -1424,6 +1424,13 @@ async function main() {
     configureFlags.unshift('--dest-cpu=x64')
   }
 
+  // On Windows, tell gyp to use VS 2022 via generator flag (bypasses auto-detection).
+  // https://github.com/nodejs/node/blob/main/BUILDING.md#windows
+  // https://github.com/nodejs/node/blob/main/tools/gyp/pylib/gyp/MSVSVersion.py
+  if (WIN32) {
+    configureFlags.push('-G', 'msvs_version=2022')
+  }
+
   // Windows uses configure.py directly, Unix uses ./configure wrapper script.
   // Use whichBinSync to resolve full path to python.exe since we use shell: false.
   const configureCommand = WIN32 ? whichBinSync('python') : './configure'
@@ -1452,20 +1459,11 @@ async function main() {
   // propagate environment variables to subprocesses.
   const execOptions = {
     cwd: NODE_DIR,
-    env: WIN32
-      ? {
-          ...process.env,
-          // Tell gyp to use VS 2022, bypassing auto-detection.
-          // https://github.com/nodejs/node/blob/main/BUILDING.md#windows
-          // https://github.com/nodejs/node/blob/main/tools/gyp/pylib/gyp/MSVSVersion.py
-          GYP_MSVS_VERSION: '2022',
-        }
-      : process.env,
+    env: process.env,
     shell: false,
   }
   if (WIN32) {
     logger.log(`DEBUG: Passing env with ${Object.keys(execOptions.env).length} variables (shell: false)`)
-    logger.log(`DEBUG: GYP_MSVS_VERSION = ${execOptions.env.GYP_MSVS_VERSION}`)
   }
 
   await exec(configureCommand, configureArgs, execOptions)