diff -uNr gcc-5.4.0.orig/libstdc++-v3/include/Makefile.in gcc-5.4.0/libstdc++-v3/include/Makefile.in
--- gcc-5.4.0.orig/libstdc++-v3/include/Makefile.in	2016-04-20 09:00:24.000000000 -0400
+++ gcc-5.4.0/libstdc++-v3/include/Makefile.in	2017-09-02 18:58:29.000000000 -0400
@@ -1694,6 +1694,8 @@
 @GLIBCXX_HOSTED_TRUE@install-data-local: install-headers
 @GLIBCXX_HOSTED_FALSE@install-data-local: install-freestanding-headers
 
+.NOTPARALLEL: install-headers
+
 # This is a subset of the full install-headers rule.  We only need <ciso646>,
 # <cstddef>, <cfloat>, <limits>, <climits>, <cstdint>, <cstdlib>, <new>,
 # <typeinfo>, <exception>, <initializer_list>, <cstdalign>, <cstdarg>,