Print error

diff --git a/emsdk.py b/emsdk.py
index 3a57020..e83b2c8 100644
--- a/emsdk.py
+++ b/emsdk.py

@@ -1440,6 +1440,7 @@
     except KeyError as e:
       # The target version of Emscripten does not (did not) have a package.json that would contain google-closure-compiler. (fastcomp)
       # Skip manual native google-closure-compiler installation there.
+      print(str(e))
       print('Emscripten version does not have a npm package.json with google-closure-compiler dependency, skipping native google-closure-compiler install step')
       return True