diff --git a/tako/config.tako b/tako/config.tako
index 0a9449e..9f6f375 100644
--- a/tako/config.tako
+++ b/tako/config.tako
@@ -40,58 +40,59 @@ $TAKO_SETTINGS.aliases.update({
         'workon': _workon,
 })
 
-if '256color' in $TERM:
-    colors = {
-        'blue': 81,
-        'orange': 166,
-        'purple': 135,
-        'red': 196,
-        'green': 118,
-        'gray': 241,
-    }
+if 'TERM' in __tako_env__:
+    if '256color' in $TERM:
+        colors = {
+            'blue': 81,
+            'orange': 166,
+            'purple': 135,
+            'red': 196,
+            'green': 118,
+            'gray': 241,
+        }
 
-    def colorize(color, text):
-        prefix = '{COLOR_' + str(colors[color]) + '}'
-        suffix = '{NO_COLOR}'
-        return prefix + text + suffix
-else:
-    colors = {
-        'blue': 'BLUE',
-        'orange': 'YELLOW',
-        'purple': 'PURPLE',
-        'red': 'RED',
-        'green': 'GREEN',
-        'gray': 'WHITE',
-    }
-    def colorize(color, text):
-        prefix = '{%s}' % colors[color]
-        suffix = '{NO_COLOR}'
-        return prefix + text + suffix
+        def colorize(color, text):
+            prefix = '{COLOR_' + str(colors[color]) + '}'
+            suffix = '{NO_COLOR}'
+            return prefix + text + suffix
+    else:
+        colors = {
+            'blue': 'BLUE',
+            'orange': 'YELLOW',
+            'purple': 'PURPLE',
+            'red': 'RED',
+            'green': 'GREEN',
+            'gray': 'WHITE',
+        }
+        def colorize(color, text):
+            prefix = '{%s}' % colors[color]
+            suffix = '{NO_COLOR}'
+            return prefix + text + suffix
 
-def git_branch():
-    ref=$(git symbolic-ref HEAD err> /dev/null)
-    if not ref: return None
-    prefix = colorize('gray', ':')
-    branch = colorize('orange', re.sub('^refs/heads/', '', ref[0].strip()))
-    return prefix + branch
+    def git_branch():
+        ref=$(git symbolic-ref HEAD err> /dev/null)
+        if not ref: return None
+        prefix = colorize('gray', ':')
+        branch = colorize('orange', re.sub('^refs/heads/', '', ref[0].strip()))
+        return prefix + branch
 
-$TAKO_SETTINGS.prompt_fields['git_branch'] = git_branch
+    $TAKO_SETTINGS.prompt_fields['git_branch'] = git_branch
 
-def make_prompt():
-    username = colorize('purple', '{user}')
-    host = colorize('blue', '{hostname}')
-    directory = colorize('green', '{cwd}')
-    lbrkt = colorize('gray', '[')
-    rbrkt = colorize('gray', ']')
-    colon = colorize('gray', ':')
+    def make_prompt():
+        username = colorize('purple', '{user}')
+        host = colorize('blue', '{hostname}')
+        directory = colorize('green', '{cwd}')
+        lbrkt = colorize('gray', '[')
+        rbrkt = colorize('gray', ']')
+        colon = colorize('gray', ':')
 
-    return lbrkt + colon.join([
-            username,
-            host,
-            directory,
-    ]) + '{git_branch}' + rbrkt + '\n{prompt_end} '
+        return lbrkt + colon.join([
+                username,
+                host,
+                directory,
+        ]) + '{git_branch}' + rbrkt + '\n{prompt_end} '
 
-$TAKO_SETTINGS.prompt = make_prompt()
+    $TAKO_SETTINGS.prompt = make_prompt()
 
 $TAKO_SETTINGS.show_traceback = True
 $TAKO_SETTINGS.traceback_logfile = $HOME + '/tmp/tako.log'