diff --git a/README.md b/README.md
index 6c37296..8faa5c8 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,14 @@ This openembedded layer provides the rust compiler, tools for building packages
 ## What doesn't:
 
  - Probably some of the untested things
+ - cargo and cargo-native (use a local package for -native)
+	- We provide .bb files for these, and they are working every
+	  now-and-then. Unfortunately, rust moves a bit too quickly for cargo
+          to keep up, and it ends up broken fairly often.
 
 ## What's untested:
 
- - cargo, rust (built for target)
+ - rust (built for target)
  - Other TARGETs
 
 ## Common issues when packaging things using cargo
diff --git a/recipes/rust/rust_0.12.0+2014-12-01.bb b/recipes/rust/rust_0.12.0+2014-12-01.bb
index 0cbe90f..8e0f14e 100644
--- a/recipes/rust/rust_0.12.0+2014-12-01.bb
+++ b/recipes/rust/rust_0.12.0+2014-12-01.bb
@@ -1,4 +1,4 @@
-SRCREV = "de95ad4c46788518822326941bdc5084b1023abf"
+SRCREV = "21ba1d5e58144c83093a8cbb467a6c9cb12fc4a1"
 require rust-git.inc
 
 SRC_URI_append = "\
@@ -14,5 +14,3 @@ SRC_URI_append = "\
 	file://0010-XXX-configure-unneeded-windows-check.patch \
 	file://0011-Parallelize-submake-invocations.patch \
 "
-
-DEFAULT_PREFERENCE = "-1"