gistfile1.diff

diff --git a/repl/repl.py b/repl/repl.py
index dfdfaf0..a3a37cb 100644
--- a/repl/repl.py
+++ b/repl/repl.py
@@ -1,4 +1,5 @@
 import re
+from os import path
 from functools import reduce

 from . import PY3K
@@ -9,10 +10,15 @@ from .ftfy import fix_text
 if PY3K:
     unicode = str

+repl_base = path.abspath(path.dirname(__file__))
+

 def get_repl(language, repl_def):
     if repl_def.get("cmd") is not None:
-        return Repl(repl_def.pop("cmd"), **repl_def)
+        return Repl(
+            repl_def.pop("cmd").format(repl_base=repl_base),
+            **repl_def
+        )
     raise ReplStartError("No worksheet REPL found for " + language)


diff --git a/worksheet.py b/worksheet.py
index 892be36..e6c4bd8 100644
--- a/worksheet.py
+++ b/worksheet.py
@@ -97,12 +97,8 @@ class WorksheetCommand(sublime_plugin.TextCommand):
             repl_def = dict(
                 list(default_def.items()) + list(repl_defs.get(language, {}).items()))
             filename = self.view.file_name()
-            if repl_def["cwd"] == "package_base":
-                repl_def["cwd"] = os.path.dirname(__file__)
-            elif repl_def["cwd"] is None:
-                filename = self.view.file_name()
-                if filename is not None:
-                    repl_def["cwd"] = os.path.dirname(filename)
+            if filename is not None:
+                repl_def["cwd"] = os.path.dirname(filename)
             self.repl = repl.get_repl(language, repl_def)
         except repl.ReplStartError as e:
             return sublime.error_message(e.message)
diff --git a/worksheet.sublime-settings b/worksheet.sublime-settings
index 85719df..da261dc 100644
--- a/worksheet.sublime-settings
+++ b/worksheet.sublime-settings
@@ -11,8 +11,7 @@
             "prompt": ["node> ", "\\.\\.+ "]
         },
         "Perl": {
-            "cmd": "re.pl --rcfile=./repl/perl.rc --profile Minimal",
-            "cwd": "package_base",
+            "cmd": "re.pl --rcfile=\"{repl_base}/perl/perl.rc\" --profile Minimal",
             "prompt": [">>> "],
             "prefix": "# > ",
             "error": ["[A-Z][a-z]+error:"]