From a62de503d838759ac618059b2d7126e62f1c66ed Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Wed, 29 Aug 2012 23:17:29 -0400
Subject: Add OPK_PACKAGES environment variable.

---
diff --git a/specs/spf-2.0/buildsys.mdwn b/specs/spf-2.0/buildsys.mdwn
index c5d6fd5..63598ca 100644
--- a/specs/spf-2.0/buildsys.mdwn
+++ b/specs/spf-2.0/buildsys.mdwn
@@ -49,6 +49,16 @@ The following environment variables shall be set to describe the source package:
 
   * `OPK_BINARY_VERSION`
 
+  * `OPK_PACKAGES`
+
+    A list of binary packages to be built.
+
+    This may not include all packages for which the source package has metadata.
+    The `Architecture` field of some packages may not match the host
+    architecture for which packages are to be built.  Only
+    architecture-dependent or architecture-independent packages may have been
+    selected for building.
+
 Build and Host System Variables [env-vars-sys]
 ----------------------------------------------
 
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