X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=contrib%2Fasdf-install%2Finstaller.lisp;h=b43f15ada9834099874243623f5cb7897be2a422;hb=a42922aef908a1b45ae5420d51b2ca7ee1bafb9e;hp=0af1455edce4bd51c6725633457a0e7b32b6e910;hpb=4de6d945ea6d378a8beec681b6c73fdec7076422;p=sbcl.git

diff --git a/contrib/asdf-install/installer.lisp b/contrib/asdf-install/installer.lisp
index 0af1455..b43f15a 100644
--- a/contrib/asdf-install/installer.lisp
+++ b/contrib/asdf-install/installer.lisp
@@ -2,8 +2,9 @@
 
 (defvar *proxy* (posix-getenv "http_proxy"))
 (defvar *cclan-mirror*
-  (or (posix-getenv "CCLAN_MIRROR")
-      "http://ftp.linux.org.uk/pub/lisp/cclan/"))
+  (let ((mirror (posix-getenv "CCLAN_MIRROR")))
+    (or (and (not (string= mirror "")) mirror)
+        "http://ftp.linux.org.uk/pub/lisp/cclan/")))
 
 (defun directorify (name)
   ;; input name may or may not have a training #\/, but we know we