diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index 7d247b5ef4..7dfd3e50ed 100755
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -11,6 +11,17 @@ UBUNTU_COMMON_PKGS="make libssl-dev libcurl4-openssl-dev libexpat-dev
  tcl tk gettext zlib1g-dev perl-modules liberror-perl libauthen-sasl-perl
  libemail-valid-perl libio-socket-ssl-perl libnet-smtp-ssl-perl"
 
+# Make sudo a no-op and execute the command directly when running as root.
+# While using sudo would be fine on most platforms when we are root already,
+# some platforms like e.g. Alpine Linux do not have sudo available by default
+# and would thus break.
+if test "$(id -u)" -eq 0
+then
+	sudo () {
+		"$@"
+	}
+fi
+
 case "$distro" in
 ubuntu-*)
 	sudo apt-get -q update