diff --git a/ci/run_shellcheck.sh b/ci/run_shellcheck.sh
index 0b32cbc..cab0bca 100755
--- a/ci/run_shellcheck.sh
+++ b/ci/run_shellcheck.sh
@@ -6,10 +6,16 @@ set -o nounset
 set -o errtrace
 shopt -s inherit_errexit
 
-ci/run_shellcheck mkdir -p /opt/shellcheck
-[[ ! -e /opt/shellcheck/shellcheck ]] && wget -qO- https://github.com/koalaman/shellcheck/releases/download/stable/shellcheck-stable.linux.x86_64.tar.xz
-  | tar -xJv -O shellcheck-stable/shellcheck | sudo tee /opt/shellcheck/shellcheck
-  > /dev/null || true
-sudo chmod +x /opt/shellcheck/shellcheck
+if [[ ! -e /opt/shellcheck/shellcheck ]]; then
+  mkdir -p /opt/shellcheck
+
+  wget -qO- https://github.com/koalaman/shellcheck/releases/download/stable/shellcheck-stable.linux.x86_64.tar.xz \
+    | tar xJv -O shellcheck-stable/shellcheck \
+    > /opt/shellcheck/shellcheck
+
+  chmod +x /opt/shellcheck/shellcheck
+fi
+
 /opt/shellcheck/shellcheck --version
-/opt/shellcheck/shellcheck $(grep -lzP '^#!/bin/\\w+sh' -r .)
+
+grep -lZP '^#!/bin/\w+sh' -R | xargs -0 /opt/shellcheck/shellcheck