diff --git a/sh/lint/shellcheck.sh b/sh/lint/shellcheck.sh
index 0cbe758..ac8c700 100644
--- a/sh/lint/shellcheck.sh
+++ b/sh/lint/shellcheck.sh
@@ -3,10 +3,12 @@ rwx_shellcheck() {
 	local file module modules path
 	file="$(mktemp)"
 	modules="$(rwx_find_shell "${root}")"
-	printf "%s\n" "${modules}" | while IFS= read -r module; do
+	rwx_ifs_set
+	for module in ${modules}; do
 		path="${root}/${module}"
 		echo ". \"${path}\"" >>"${file}"
 	done
+	rwx_ifs_unset
 	rwx_shellcheck_file "${file}"
 	rwx_remove "${file}"
 }
diff --git a/sh/main.sh b/sh/main.sh
index 48e7f08..75036ef 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -132,6 +132,23 @@ rwx_shell_interactive() {
 	esac
 }
 
+# ╭──────┬─────╮
+# │ main │ ifs │
+# ╰──────┴─────╯
+
+# set internal field separator to line feed
+rwx_ifs_set() {
+	_RWX_IFS="${IFS}"
+	IFS="
+"
+}
+
+# unset internal field separator
+rwx_ifs_unset() {
+	IFS="${_RWX_IFS}"
+	unset RWX_IFS
+}
+
 # ╭──────┬──────╮
 # │ main │ find │
 # ╰──────┴──────╯
diff --git a/sh/self.sh b/sh/self.sh
index dfbe203..a7ebca2 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -181,14 +181,13 @@ rwx_self_write() {
 		local file text
 		text="#! /usr/bin/env sh
 "
-		local files="$(rwx_self_subset "${@}")"
-		while IFS= read -r file; do
+		rwx_ifs_set
+		for file in $(rwx_self_subset "${@}"); do
 			text="${text}
 $(cat "${RWX_ROOT_SYSTEM}/${file}")
 "
-		done <<EOF
-${files}
-EOF
+		done
+		rwx_ifs_unset
 		rwx_file_write "${target}" "${text}"
 		rwx_shfmt "${target}"
 		rwx_shellcheck_file "${target}"