diff --git a/src/ci/docker/cross/build-arm-musl.sh b/src/ci/docker/cross/build-arm-musl.sh
index 567e5d9ac986..f9444a35a8b7 100755
--- a/src/ci/docker/cross/build-arm-musl.sh
+++ b/src/ci/docker/cross/build-arm-musl.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/cross/build-rumprun.sh b/src/ci/docker/cross/build-rumprun.sh
index 59b1c9b64153..ad38cf872ad0 100755
--- a/src/ci/docker/cross/build-rumprun.sh
+++ b/src/ci/docker/cross/build-rumprun.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/cross/install-x86_64-redox.sh b/src/ci/docker/cross/install-x86_64-redox.sh
index 8e052c4acd28..9bfb57f5741c 100755
--- a/src/ci/docker/cross/install-x86_64-redox.sh
+++ b/src/ci/docker/cross/install-x86_64-redox.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/cross2/build-fuchsia-toolchain.sh b/src/ci/docker/cross2/build-fuchsia-toolchain.sh
index 756013a235cc..ef8f0c37f8c3 100755
--- a/src/ci/docker/cross2/build-fuchsia-toolchain.sh
+++ b/src/ci/docker/cross2/build-fuchsia-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/cross2/build-solaris-toolchain.sh b/src/ci/docker/cross2/build-solaris-toolchain.sh
index 71ab998aab20..c04c8b7194c7 100755
--- a/src/ci/docker/cross2/build-solaris-toolchain.sh
+++ b/src/ci/docker/cross2/build-solaris-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/disabled/dist-x86_64-dragonfly/build-toolchain.sh b/src/ci/docker/disabled/dist-x86_64-dragonfly/build-toolchain.sh
index 3d58f3d307c7..2ebbe0cdee9b 100755
--- a/src/ci/docker/disabled/dist-x86_64-dragonfly/build-toolchain.sh
+++ b/src/ci/docker/disabled/dist-x86_64-dragonfly/build-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/disabled/dist-x86_64-haiku/build-toolchain.sh b/src/ci/docker/disabled/dist-x86_64-haiku/build-toolchain.sh
index 0776d448984e..a1115e254b5b 100755
--- a/src/ci/docker/disabled/dist-x86_64-haiku/build-toolchain.sh
+++ b/src/ci/docker/disabled/dist-x86_64-haiku/build-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/disabled/dist-x86_64-haiku/fetch-packages.sh b/src/ci/docker/disabled/dist-x86_64-haiku/fetch-packages.sh
index 0f6034cdb862..a37532e203aa 100755
--- a/src/ci/docker/disabled/dist-x86_64-haiku/fetch-packages.sh
+++ b/src/ci/docker/disabled/dist-x86_64-haiku/fetch-packages.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/disabled/wasm32-exp/node.sh b/src/ci/docker/disabled/wasm32-exp/node.sh
index dfa7f221ffa2..2bfddb0de99b 100755
--- a/src/ci/docker/disabled/wasm32-exp/node.sh
+++ b/src/ci/docker/disabled/wasm32-exp/node.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-aarch64-linux/build-toolchains.sh b/src/ci/docker/dist-aarch64-linux/build-toolchains.sh
index 94f785c96f81..22b719bb3075 100755
--- a/src/ci/docker/dist-aarch64-linux/build-toolchains.sh
+++ b/src/ci/docker/dist-aarch64-linux/build-toolchains.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-arm-linux/build-toolchains.sh b/src/ci/docker/dist-arm-linux/build-toolchains.sh
index f78ecf9381a1..c53cca0bb982 100755
--- a/src/ci/docker/dist-arm-linux/build-toolchains.sh
+++ b/src/ci/docker/dist-arm-linux/build-toolchains.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-armhf-linux/build-toolchains.sh b/src/ci/docker/dist-armhf-linux/build-toolchains.sh
index df1134d5483c..964182a5ad54 100755
--- a/src/ci/docker/dist-armhf-linux/build-toolchains.sh
+++ b/src/ci/docker/dist-armhf-linux/build-toolchains.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-armv7-linux/build-toolchains.sh b/src/ci/docker/dist-armv7-linux/build-toolchains.sh
index 2d395fee792e..40adfe5d53e0 100755
--- a/src/ci/docker/dist-armv7-linux/build-toolchains.sh
+++ b/src/ci/docker/dist-armv7-linux/build-toolchains.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-freebsd/build-toolchain.sh b/src/ci/docker/dist-i686-freebsd/build-toolchain.sh
index 8343327c33bf..3c86a8e38175 100755
--- a/src/ci/docker/dist-i686-freebsd/build-toolchain.sh
+++ b/src/ci/docker/dist-i686-freebsd/build-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-binutils.sh b/src/ci/docker/dist-i686-linux/build-binutils.sh
index 80aa1f2a0161..f4bdbd80d0ed 100755
--- a/src/ci/docker/dist-i686-linux/build-binutils.sh
+++ b/src/ci/docker/dist-i686-linux/build-binutils.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-cmake.sh b/src/ci/docker/dist-i686-linux/build-cmake.sh
index 82e46455cb0f..9a3763d421ad 100755
--- a/src/ci/docker/dist-i686-linux/build-cmake.sh
+++ b/src/ci/docker/dist-i686-linux/build-cmake.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-curl.sh b/src/ci/docker/dist-i686-linux/build-curl.sh
index b7d22755a571..edf3175b81c4 100755
--- a/src/ci/docker/dist-i686-linux/build-curl.sh
+++ b/src/ci/docker/dist-i686-linux/build-curl.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-gcc.sh b/src/ci/docker/dist-i686-linux/build-gcc.sh
index ab2562538d6d..6b991bb59e4b 100755
--- a/src/ci/docker/dist-i686-linux/build-gcc.sh
+++ b/src/ci/docker/dist-i686-linux/build-gcc.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-git.sh b/src/ci/docker/dist-i686-linux/build-git.sh
index 92fa66b496d9..ff62a68629a8 100755
--- a/src/ci/docker/dist-i686-linux/build-git.sh
+++ b/src/ci/docker/dist-i686-linux/build-git.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-headers.sh b/src/ci/docker/dist-i686-linux/build-headers.sh
index 4ce38fd9205e..2f15114d6f98 100755
--- a/src/ci/docker/dist-i686-linux/build-headers.sh
+++ b/src/ci/docker/dist-i686-linux/build-headers.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-openssl.sh b/src/ci/docker/dist-i686-linux/build-openssl.sh
index 34da0ed63109..e7226ace020b 100755
--- a/src/ci/docker/dist-i686-linux/build-openssl.sh
+++ b/src/ci/docker/dist-i686-linux/build-openssl.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-i686-linux/build-python.sh b/src/ci/docker/dist-i686-linux/build-python.sh
index a7a450f3c8de..c6b8cdde4b9a 100755
--- a/src/ci/docker/dist-i686-linux/build-python.sh
+++ b/src/ci/docker/dist-i686-linux/build-python.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-powerpc-linux/build-powerpc-toolchain.sh b/src/ci/docker/dist-powerpc-linux/build-powerpc-toolchain.sh
index 90a4df0c1958..15211acb4459 100755
--- a/src/ci/docker/dist-powerpc-linux/build-powerpc-toolchain.sh
+++ b/src/ci/docker/dist-powerpc-linux/build-powerpc-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-powerpc64-linux/build-powerpc64-toolchain.sh b/src/ci/docker/dist-powerpc64-linux/build-powerpc64-toolchain.sh
index c477cd61f98d..ac6460a47299 100755
--- a/src/ci/docker/dist-powerpc64-linux/build-powerpc64-toolchain.sh
+++ b/src/ci/docker/dist-powerpc64-linux/build-powerpc64-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh b/src/ci/docker/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh
index 5f556b67081a..2f6937afff03 100755
--- a/src/ci/docker/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh
+++ b/src/ci/docker/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-s390x-linux/build-s390x-toolchain.sh b/src/ci/docker/dist-s390x-linux/build-s390x-toolchain.sh
index b4995e20dc69..306204dd0e1f 100755
--- a/src/ci/docker/dist-s390x-linux/build-s390x-toolchain.sh
+++ b/src/ci/docker/dist-s390x-linux/build-s390x-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-freebsd/build-toolchain.sh b/src/ci/docker/dist-x86_64-freebsd/build-toolchain.sh
index 8343327c33bf..3c86a8e38175 100755
--- a/src/ci/docker/dist-x86_64-freebsd/build-toolchain.sh
+++ b/src/ci/docker/dist-x86_64-freebsd/build-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-binutils.sh b/src/ci/docker/dist-x86_64-linux/build-binutils.sh
index 80aa1f2a0161..f4bdbd80d0ed 100755
--- a/src/ci/docker/dist-x86_64-linux/build-binutils.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-binutils.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-cmake.sh b/src/ci/docker/dist-x86_64-linux/build-cmake.sh
index 82e46455cb0f..9a3763d421ad 100755
--- a/src/ci/docker/dist-x86_64-linux/build-cmake.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-cmake.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-curl.sh b/src/ci/docker/dist-x86_64-linux/build-curl.sh
index b7d22755a571..edf3175b81c4 100755
--- a/src/ci/docker/dist-x86_64-linux/build-curl.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-curl.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-gcc.sh b/src/ci/docker/dist-x86_64-linux/build-gcc.sh
index ab2562538d6d..6b991bb59e4b 100755
--- a/src/ci/docker/dist-x86_64-linux/build-gcc.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-gcc.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-git.sh b/src/ci/docker/dist-x86_64-linux/build-git.sh
index 92fa66b496d9..ff62a68629a8 100755
--- a/src/ci/docker/dist-x86_64-linux/build-git.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-git.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-headers.sh b/src/ci/docker/dist-x86_64-linux/build-headers.sh
index 4ce38fd9205e..2f15114d6f98 100755
--- a/src/ci/docker/dist-x86_64-linux/build-headers.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-headers.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-openssl.sh b/src/ci/docker/dist-x86_64-linux/build-openssl.sh
index 34da0ed63109..e7226ace020b 100755
--- a/src/ci/docker/dist-x86_64-linux/build-openssl.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-openssl.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-linux/build-python.sh b/src/ci/docker/dist-x86_64-linux/build-python.sh
index a7a450f3c8de..c6b8cdde4b9a 100755
--- a/src/ci/docker/dist-x86_64-linux/build-python.sh
+++ b/src/ci/docker/dist-x86_64-linux/build-python.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/docker/dist-x86_64-netbsd/build-netbsd-toolchain.sh b/src/ci/docker/dist-x86_64-netbsd/build-netbsd-toolchain.sh
index 54100b49cb9f..9e1b769f6c40 100755
--- a/src/ci/docker/dist-x86_64-netbsd/build-netbsd-toolchain.sh
+++ b/src/ci/docker/dist-x86_64-netbsd/build-netbsd-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
@@ -64,12 +64,12 @@ cd ../..
 rm -rf usr
 
 cat > /x-tools/x86_64-unknown-netbsd/bin/x86_64--netbsd-gcc-sysroot <<'EOF'
-#!/bin/bash
+#!/usr/bin/env bash
 exec /x-tools/x86_64-unknown-netbsd/bin/x86_64--netbsd-gcc --sysroot=/x-tools/x86_64-unknown-netbsd/sysroot "$@"
 EOF
 
 cat > /x-tools/x86_64-unknown-netbsd/bin/x86_64--netbsd-g++-sysroot <<'EOF'
-#!/bin/bash
+#!/usr/bin/env bash
 exec /x-tools/x86_64-unknown-netbsd/bin/x86_64--netbsd-g++ --sysroot=/x-tools/x86_64-unknown-netbsd/sysroot "$@"
 EOF
 
diff --git a/src/ci/docker/run.sh b/src/ci/docker/run.sh
index dc02310b4f21..a863e1a2d5dc 100755
--- a/src/ci/docker/run.sh
+++ b/src/ci/docker/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/init_repo.sh b/src/ci/init_repo.sh
index 7ffe00a807b3..e073a3d99c15 100755
--- a/src/ci/init_repo.sh
+++ b/src/ci/init_repo.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.
diff --git a/src/ci/run.sh b/src/ci/run.sh
index b4fa033c4a66..fd83bb825410 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.