diff -up netcdf-c-4.8.0/lib_flags.am.builddir netcdf-c-4.8.0/lib_flags.am
--- netcdf-c-4.8.0/lib_flags.am.builddir	2021-03-30 14:23:10.000000000 -0600
+++ netcdf-c-4.8.0/lib_flags.am	2021-04-10 17:53:34.640271561 -0600
@@ -6,7 +6,7 @@
 # libraries for netCDF-4.
 #
 
-AM_CPPFLAGS = -I$(top_srcdir)/include
+AM_CPPFLAGS = -I$(top_builddir)/include -I$(top_srcdir)/include
 AM_LDFLAGS =
 
 if USE_DAP