Update both mips musl download locations
diff --git a/.travis.yml b/.travis.yml
index 71c771d..fa07ffc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,7 +33,7 @@
     # build documentation
     - os: linux
       env: TARGET=x86_64-unknown-linux-gnu
-      rust: nightly-2016-11-26
+      rust: nightly
       script: sh ci/dox.sh
 
     # stable compat
@@ -103,10 +103,10 @@
     # nightly
     - os: linux
       env: TARGET=x86_64-unknown-linux-gnu
-      rust: nightly-2016-11-26
+      rust: nightly
     - os: osx
       env: TARGET=x86_64-apple-darwin
-      rust: nightly-2016-11-26
+      rust: nightly
 
     # QEMU based targets that compile in an emulator
     - os: linux