message: Setting tbb path through with_env on windows tests.
diff: @@ -15,9 +15,10 @@ def runTests(String prefix = "") {
  }
  def runWinTests(String prefix = "") {
  - """ mingw32-make -j${env.PARALLEL} build
  - ${prefix}runCmdStanTests.py -j${env.PARALLEL} src/test/interface
  - """
  + withEnv(['PATH+TBB=./stan/lib/stan_math/lib/tbb']) {
  + bat "mingw32-make -j${env.PARALLEL} build"
  + bat "${prefix}runCmdStanTests.py -j${env.PARALLEL} src/test/interface"
  + }
  }
  def deleteDirWin() {
  @@ -64,7 +65,7 @@ pipeline {
  agent { label 'windows' }
  steps {
  setupCXX()
  - bat runWinTests()
  + runWinTests()
  }
  post {
  always {
  