get version from environment in cross-platform way
diff --git a/rebar.config.script b/rebar.config.script
index 6c6f7fb..6224dc3 100644
--- a/rebar.config.script
+++ b/rebar.config.script
@@ -29,7 +29,7 @@
{b64url, "b64url", "6895652d80f95cdf04efb14625abed868998f174"},
{couch_log, "couch-log", "ad803f66dbd1900b67543259142875a6d03503ce"},
{chttpd, "chttpd", "2c1f3a3167b4b667ec8cbc5a5079911a17630753"},
-{couch, "couch", "c613dabf635ca3a5d6de2240d00b80c334dc8f43"},
+{couch, "couch", "7d0cfb5f9d1f0fcdc607b46f31ae33cbf65115df"},
{couch_index, "couch-index", "53555fd909d5dd3d4a610c3fd6795950a8f7d022"},
{couch_mrview, "couch-mrview", "a0b0392afe66ece9ef3bb4fdd5a4f159c97c47eb"},
{couch_replicator, "couch-replicator", "b9232c8d410d529d65030896e075c4b4327631b0"},