go build -tags cse main.go
results in this error
/usr/local/go/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/usr/bin/ld: cannot find /usr/lib/x86_64-linux-gnu/librt.so: No such file or directory
collect2: error: ld returned 1 exit status
I have installed libmongocrypt from source.