Error: Failed to build mongodb: command execution failed

[dbl001 (dbl)]

I'm on OS X 10.11.6 from main.log:

:info:build duplicate symbol __ZN5mongo13error_details11isNamedCodeILi11000EEE in:
:info:build     build/MP/mongo/s/cluster_cursor_stats.o

Environment:

$ clang --version
clang version 5.0.0 (tags/RELEASE_500/final)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Users/davidlaxer/anaconda/bin
$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
$ sudo port upgrade outdated
--->  Computing dependencies for clang-9.0
--->  Fetching archive for clang-9.0
--->  Attempting to fetch clang-9.0-9.0.0_0+analyzer+libstdcxx.darwin_15.x86_64.tbz2 from https://packages.macports.org/clang-9.0
--->  Attempting to fetch clang-9.0-9.0.0_0+analyzer+libstdcxx.darwin_15.x86_64.tbz2.rmd160 from https://packages.macports.org/clang-9.0
--->  Installing clang-9.0 @9.0.0_0+analyzer+libstdcxx
--->  Activating clang-9.0 @9.0.0_0+analyzer+libstdcxx
--->  Cleaning clang-9.0
--->  Computing dependencies for mongodb
--->  Fetching archive for mongodb
--->  Attempting to fetch mongodb-4.0.13_0.darwin_15.x86_64.tbz2 from https://packages.macports.org/mongodb
--->  Attempting to fetch mongodb-4.0.13_0.darwin_15.x86_64.tbz2 from http://aus.us.packages.macports.org/macports/packages/mongodb
--->  Attempting to fetch mongodb-4.0.13_0.darwin_15.x86_64.tbz2 from http://ywg.ca.packages.macports.org/mirror/macports/packages/mongodb
--->  Fetching distfiles for mongodb
--->  Attempting to fetch mongodb-src-r4.0.13.tar.gz from https://fastdl.mongodb.org/src
--->  Verifying checksums for mongodb                                           
--->  Extracting mongodb
--->  Applying patches to mongodb
--->  Configuring mongodb
--->  Building mongodb
Error: Failed to build mongodb: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_databases_mongodb/mongodb/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.