diff --git a/packelf.sh b/packelf.sh
index fde811c..f5ab6de 100755
--- a/packelf.sh
+++ b/packelf.sh
@@ -11,6 +11,11 @@ dst="$2"
 shift
 shift
 
+libs="$(ldd "$src" | grep -F '/' | sed -E 's|[^/]*/([^ ]+).*?|/\1|')"
+ld_so="$(echo "$libs" | grep -F '/ld-linux-')"
+ld_so="$(basename "$ld_so")"
+program="$(basename "$src")"
+
 cat >"$dst" <<EOF
 #!/bin/bash
 tmp_dir="\$(mktemp -d)"
@@ -21,13 +26,11 @@ if ! (touch "\$check_path" && chmod +x "\$check_path" && [ -x "\$check_path" ]);
     tmp_dir="\$(TMPDIR="\$(pwd)" mktemp -d)"
 fi
 sed '1,/^#__END__$/d' "\$0" | tar -xz -C "\$tmp_dir"
-"\$tmp_dir/LD_SO" --library-path "\$tmp_dir" "\$tmp_dir/PROGRAM" "\$@"
+sed -i 's@/etc/ld.so.preload@/etc/___so.preload@g' "\$tmp_dir/$ld_so"
+"\$tmp_dir/$ld_so" --library-path "\$tmp_dir" "\$tmp_dir/$program" "\$@"
 exit \$?
 #__END__
 EOF
 
-libs="$(ldd "$src" | grep -F '/' | sed -E 's|[^/]*/([^ ]+).*?|/\1|')"
-ld_so="$(echo "$libs" | grep -F '/ld-linux-')"
-sed -E -i -e 's|PROGRAM|'"$(basename "$src")"'|' -e 's|LD_SO|'"$(basename "$ld_so")"'|' "$dst"
 tar -czh --transform 's/.*\///g' "$src" $libs "$@" >>"$dst" 2> >(grep -v 'Removing leading' >&2)
 chmod +x "$dst"