From a8ab6f4caf5cc351f5724079baaad36b6b5be725 Mon Sep 17 00:00:00 2001
From: Michael Vines <mvines@gmail.com>
Date: Tue, 18 Dec 2018 09:05:19 -0800
Subject: [PATCH] Preserve stable as default, use +nightly to get nightly

---
 ci/docker-rust-nightly/Dockerfile | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/ci/docker-rust-nightly/Dockerfile b/ci/docker-rust-nightly/Dockerfile
index c284c38e7d..466b57ff75 100644
--- a/ci/docker-rust-nightly/Dockerfile
+++ b/ci/docker-rust-nightly/Dockerfile
@@ -1,9 +1,14 @@
 FROM solanalabs/rust
 ARG date
 
-RUN set -x && \
-    rustup install nightly-$date && \
-    rustup default nightly-$date && \
-    rustc --version && \
-    cargo --version && \
-    cargo +nightly-$date install cargo-cov
+RUN set -x \
+ && rustup install nightly-$date \
+ && rustup show \
+ && mv /usr/local/rustup/toolchains/nightly-$date-* \
+       /usr/local/rustup/toolchains/nightly-x86_64-unknown-linux-gnu \
+ && rustup show \
+ && rustc --version \
+ && cargo --version \
+ && rustc +nightly --version \
+ && cargo +nightly --version
+