1 files changed, 11 insertions, 2 deletions
diff --git a/format.sh b/format.sh
index a0765bd03e..87e3d80014 100755
--- a/format.sh
+++ b/format.sh
@@ -5,16 +5,25 @@
 
 set -u
 
-VERSION="0.2.16"
+VERSION="0.2.17"
 CMD="rustfmt"
 INSTALL_CMD="cargo install --vers $VERSION --force rustfmt-nightly"
 
+case "$(uname -s)" in
+    Linux*)     export LD_LIBRARY_PATH=$(rustc --print sysroot)/lib;;
+    Darwin*)    export DYLD_LIBRARY_PATH=$(rustc --print sysroot)/lib;;
+    *) exit 1
+esac
+
+# Allow rustfmt to use "nighly" features. `comment_width` is one of those for example.
+# 0.2.17 started enforcing setting this variable to allow using the nighly features.
+export CFG_RELEASE_CHANNEL=nightly
+
 function correct_rustfmt() {
     if ! which $CMD; then
         echo "$CMD is not installed" >&2
         return 1
     fi
-    export DYLD_LIBRARY_PATH=$(rustc --print sysroot)/lib
     local installed_version=$($CMD --version | cut -d'-' -f1)
     if [[ "$installed_version" != "$VERSION" ]]; then
         echo "Wrong version of $CMD installed. Expected $VERSION, got $installed_version" >&2