don't use pip --user because that doesn't work as expected in a virtu…

…alenv

tale/__init__.py

@@ -64,12 +64,14 @@ def _check_required_libraries():
         all_good = False
     if not all_good:
         print("\nInstall this/these and try again. Try using your package manager (on Linux) or try executing the following command:")
-        print('  pip install --user "appdirs" "smartypants>={spv}" "colorama>={cv}" "serpent>={sv}"'
+        print('  pip install "appdirs" "smartypants>={spv}" "colorama>={cv}" "serpent>={sv}"'
               .format(spv=smartypants_version_required, cv=colorama_version_required, sv=serpent_version_required))
+        print("(you may have to add the --user option if you have insufficient privileges)")
         choice = input("\nDo you want to attempt to install them (using pip) right now (y/n)? ")
         if choice == 'y':
             import pip
-            statuscode = pip.main(["install", "--user", "appdirs", "smartypants>=" + str(smartypants_version_required),
+            # we don't use "--user" here because then it won't work when using a virtualenv.
+            statuscode = pip.main(["install", "appdirs", "smartypants>=" + str(smartypants_version_required),
                                    "colorama>=" + str(colorama_version_required), "serpent>=" + str(serpent_version_required)])
             if statuscode:
                 print("\n\nInstallation failed.\n")