https://bugs.gentoo.org/790563
--- a/configure
+++ b/configure
@@ -355,7 +355,7 @@ for app_dir in $app_dirs; do
 	echo ""
     elif test $app_dir != erts; then
 	echo $cmd_str >./configure.result.command
-	eval $cmd_str 1>./configure.result.stdout 2>./configure.result.stderr || echo "fatal" > "./configure.result.failed" &
+	eval $cmd_str 1>./configure.result.stdout 2>./configure.result.stderr || echo "fatal" > "./configure.result.failed"
     else
 	# ERTS configure gets to use stdout/stderr; the others are printed when done...
 	echo "=== Running configure in $ERL_TOP/erts ==="