Golang testing with dynamic linking for Kafka on M1 chip

I'm trying to write some unit tests for a poc I'm doing in Golang / Kafka on a new M1 Mac. I'm using the official Golang Kafka libs from confluent:

"github.com/confluentinc/confluent-kafka-go/kafka"

Apparently, this package has a dependency on a librdkafka which is not built for M1 (yet?). For the build, there is a work around here, which goes something like this:

% brew install librdkafka openssl zstd
% PKG_CONFIG_PATH="/opt/homebrew/opt/openssl@3/lib/pkgconfig"
% go build -tags dynamic *yadda yadda yadda*

This is fine for build/run. Unfortunately, it doesn't seem to work for tests. In the link describing the workaround, using go test -tags dynamic ./... seems to work, but in my case the test run doesn't seem to read the exported PKG_CONFIG_PATH:

% go test -tags dynamic ./... -v
# pkg-config --cflags  -- rdkafka
Package libcrypto was not found in the pkg-config search path.
Perhaps you should add the directory containing `libcrypto.pc'
to the PKG_CONFIG_PATH environment variable
Package 'libcrypto', required by 'rdkafka', not found
pkg-config: exit status 1
FAIL	smartAC/shared [build failed]

Even though that env var is set, at least in my shell:

% echo $PKG_CONFIG_PATH
/opt/homebrew/opt/openssl@3/lib/pkgconfig

Is there some trick to get go test tool to see the env var?

Ok, never mind. I sorted this... in my ~/.zshrc I wasn't exporting the PKG_CONFIG_PATH, so I changed this:

PKG_CONFIG_PATH="/opt/homebrew/opt/openssl@3/lib/pkgconfig"

to this:

export PKG_CONFIG_PATH="/opt/homebrew/opt/openssl@3/lib/pkgconfig"

Which seems to work. Leaving the question up, just in case it might help some other noob like me :-).