nco-4.0.0 Configure error: shell command returned error 1

[iprc-help@…]

(((Attached port -d output)))

[nil:~] iprc% sudo port install nco
--->  Computing dependencies for nco
--->  Configuring nco
Error: Target org.macports.configure returned: configure failure: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_science_nco/work/nco-4.0.0" && ./configure --prefix=/opt/local --disable-dependency-tracking --mandir=/opt/local/share/man --enable-udunits --disable-udunits2 --enable-dap-netcdf --disable-dap-opendap --enable-netcdf4 " returned error 1
Command output: checking for netinet/in.h... yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking for unistd.h... (cached) yes
checking cstdlib usability... yes
checking cstdlib presence... yes
checking for cstdlib... yes
checking for an ANSI C-conforming const... yes
checking for inline... inline
checking for pid_t... yes
checking for size_t... yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for uid_t in sys/types.h... yes
checking for ptrdiff_t... yes
checking size of int*... 8
checking whether C++ compiler implements namespaces... yes
checking whether C++ compiler has working valarray<T>... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
Beginning generic tests for DAP support
DEBUG: enable_dap_netcdf = yes and enable_dap_opendap = no
Testing for DAP-netCDF support (is DAP in libnetcdf.a?)...
checking for nc__opendap in -lnetcdf... no
configure: WARNING: DAP-netCDF support through libnetCDF disabled (missing DAP library)
checking netcdf.h usability... no
checking netcdf.h presence... no
checking for netcdf.h... no
configure: error: in `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_science_nco/work/nco-4.0.0':
configure: error: cannot find netCDF header
See `config.log' for more details.

Error: Status 1 encountered during processing.
Before reporting a bug, first run the command again with the -d flag to get complete output.

[iprc-help@…]

port -d install nco output