diff --git a/lib/resolve-id.js b/lib/resolve-id.js
index f9e2094c..316ab064 100644
--- a/lib/resolve-id.js
+++ b/lib/resolve-id.js
@@ -1,5 +1,11 @@
 var resolve = require("resolve")
-var jspmResolve = require("pkg-resolve")
+var jspmResolve
+try {
+  jspmResolve = require("pkg-resolve")
+}
+catch (ex) {
+  // pass
+}
 
 var moduleDirectories = [
   "web_modules",