:Tweak bespoke npm path resolution

Author: jdalton

src/utils/path-resolve.mts

@@ -61,6 +61,12 @@ export function findNpmDirPathSync(npmBinPath: string): string | undefined {
     ) {
       thePath = libNmNpmPath
     }
+    const hasSameLevelNmPath = isDirectorySync(
+      path.join(thePath, 'node_modules'),
+    )
+    const hasOneBackNmPath =
+      !hasSameLevelNmPath &&
+      isDirectorySync(path.join(thePath, '../node_modules'))
     if (
       // npm bin paths may look like:
       //   /usr/local/share/npm/bin/npm
@@ -72,15 +78,15 @@ export function findNpmDirPathSync(npmBinPath: string): string | undefined {
       // In practically all cases the npm path contains a node_modules folder:
       //   /usr/local/share/npm/bin/npm/node_modules
       //   C:\Program Files\nodejs\node_modules
-      (isDirectorySync(path.join(thePath, 'node_modules')) ||
+      (hasSameLevelNmPath ||
         // In some bespoke cases the node_modules folder is one level back.
-        isDirectorySync(path.join(thePath, '../node_modules'))) &&
+        hasOneBackNmPath) &&
       // Optimistically look for the default location.
       (path.basename(thePath) === 'npm' ||
         // Chocolatey installs npm bins in the same directory as node bins.
         (WIN32 && existsSync(path.join(thePath, 'npm.cmd'))))
     ) {
-      return thePath
+      return hasOneBackNmPath ? path.dirname(thePath) : thePath
     }
     const parent = path.dirname(thePath)
     if (parent === thePath) {