--- a/tools/all_errnos	2025-12-15 05:51:15.366671264 -0600
+++ b/tools/all_errnos	2026-02-20 21:39:20.242109706 -0600
@@ -1,9 +1,8 @@
-#!/bin/bash
+#!/bin/sh
 
 # Derived from all_syscalls.
 
 set -e
-set -o pipefail
 
 SED="$1"
 shift
@@ -13,9 +12,16 @@
 #include <sys/errno.h>
 "
 
-trap 'rm -f $OUTPUT $OUTPUT.deps' ERR
+cleanup() {
+	status=$?
+	if [ "$status" -ne 0 ]; then
+		rm -f "$OUTPUT" "$OUTPUT.deps"
+	fi
+}
 
-"$@" -MD -MF "$OUTPUT.deps" <<< "$ERRNO_INCLUDES" -dM -E - \
+trap cleanup EXIT HUP INT TERM
+
+printf '%s\n' "$ERRNO_INCLUDES" | "$@" -MD -MF "$OUTPUT.deps" -dM -E - \
 	| "$SED" -n -e 's/^[ \t]*#define[ \t]*E\([^ ]*\).*$/UL_ERRNO("E\1", E\1)/p' \
 	| sort \
 	> "$OUTPUT"