diff --git a/ci/docker/mips-unknown-linux-musl/Dockerfile b/ci/docker/mips-unknown-linux-musl/Dockerfile
index aee73beaa4a057a459e96bd48f87a32f56034ef7..50da684ae7b0855b4bc6c5b75bfcaac17ea619f6 100644
--- a/ci/docker/mips-unknown-linux-musl/Dockerfile
+++ b/ci/docker/mips-unknown-linux-musl/Dockerfile
@@ -8,7 +8,7 @@ RUN mkdir /toolchain
 
 # Note that this originally came from:
 # https://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/OpenWrt-SDK-ar71xx-generic_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2
-RUN curl --retry 5 -L https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/OpenWrt-SDK-ar71xx-generic_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2 | \
+RUN curl --retry 5 -L https://rust-lang-ci-mirrors.s3-us-west-1.amazonaws.com/libc/OpenWrt-SDK-ar71xx-generic_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2 | \
     tar xjf - -C /toolchain --strip-components=1
 
 ENV PATH=$PATH:/rust/bin:/toolchain/staging_dir/toolchain-mips_34kc_gcc-5.3.0_musl-1.1.15/bin \
diff --git a/ci/docker/mipsel-unknown-linux-musl/Dockerfile b/ci/docker/mipsel-unknown-linux-musl/Dockerfile
index 03e83578ea90c4896826e0d2c8f3f31b6b535a43..91c00c250cab08f1b91495c5945766981a0e851b 100644
--- a/ci/docker/mipsel-unknown-linux-musl/Dockerfile
+++ b/ci/docker/mipsel-unknown-linux-musl/Dockerfile
@@ -8,7 +8,7 @@ RUN mkdir /toolchain
 
 # Note that this originally came from:
 # https://downloads.openwrt.org/snapshots/trunk/malta/generic/OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2
-RUN curl --retry 5 -L https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2 | \
+RUN curl --retry 5 -L https://rust-lang-ci-mirrors.s3-us-west-1.amazonaws.com/libc/OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2 | \
       tar xjf - -C /toolchain --strip-components=2
 
 ENV PATH=$PATH:/rust/bin:/toolchain/bin \
diff --git a/ci/run.sh b/ci/run.sh
index 6f2ca11fe40901c30471521b9f2a0d25cfee0f9f..e863085d9a15e3e0517f76109165958c75b58490 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -5,6 +5,8 @@
 
 set -ex
 
+MIRRORS_URL="https://rust-lang-ci-mirrors.s3-us-west-1.amazonaws.com/libc"
+
 TARGET="${1}"
 
 # If we're going to run tests inside of a qemu image, then we don't need any of
@@ -21,21 +23,21 @@ if [ "$QEMU" != "" ]; then
     # image is .gz : download and uncompress it
     qemufile="$(echo "${QEMU%.gz}" | sed 's/\//__/g')"
     if [ ! -f "${tmpdir}/${qemufile}" ]; then
-      curl --retry 5 "https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/${QEMU}" | \
+      curl --retry 5 "${MIRRORS_URL}/${QEMU}" | \
           gunzip -d > "${tmpdir}/${qemufile}"
     fi
   elif [ -z "${QEMU#*.xz}" ]; then
     # image is .xz : download and uncompress it
     qemufile="$(echo "${QEMU%.xz}" | sed 's/\//__/g')"
     if [ ! -f "${tmpdir}/${qemufile}" ]; then
-      curl --retry 5 "https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/${QEMU}" | \
+      curl --retry 5 "${MIRRORS_URL}/${QEMU}" | \
           unxz > "${tmpdir}/${qemufile}"
     fi
   else
     # plain qcow2 image: just download it
     qemufile="$(echo "${QEMU}" | sed 's/\//__/g')"
     if [ ! -f "${tmpdir}/${qemufile}" ]; then
-      curl --retry 5 "https://s3-us-west-1.amazonaws.com/rust-lang-ci2/libc/${QEMU}" \
+      curl --retry 5 "${MIRRORS_URL}/${QEMU}" | \
         > "${tmpdir}/${qemufile}"
     fi
   fi