Explicitly specify Go distribution for tests

Author: ycombinator

.buildkite/pipeline.yml

@@ -103,6 +103,7 @@ steps:
         env:
           FIPS: "true"
           GOEXPERIMENT: "systemcrypto"
+          GO_DISTRO: "microsoft"
         agents:
           provider: "aws"
           image: "${IMAGE_UBUNTU_X86_64_FIPS}"
@@ -117,6 +118,7 @@ steps:
         env:
           FIPS: "true"
           GOEXPERIMENT: "systemcrypto"
+          GO_DISTRO: "stdlib"
         agents:
           provider: "aws"
           image: "${IMAGE_UBUNTU_X86_64_FIPS}"

.buildkite/scripts/unit_test.sh

@@ -7,7 +7,7 @@ source .buildkite/scripts/common.sh
 
 add_bin_path
 
-if [[ ${FIPS:-false} == "true" ]]; then
+if [[ ${FIPS:-false} == "true" && ${GO_DISTRO:-stdlib} == "microsoft" ]]; then
     with_msft_go
 else
   with_go