How to set PATH for all steps in Azure Pipeline Yaml?

I want to define the PATH only once for the whole pipeline.

Is this possible?

I've done this, but it doesn't work:

trigger:
  - master

jobs:
  - job: Application
    pool:
      vmImage: ubuntu-latest
    steps:
      - task: CmdLine@2
        displayName: "Install flutter"
        inputs:
          workingDirectory: $(Agent.ToolsDirectory)
          script: |
            git clone https://github.com/flutter/flutter.git -b stable --depth 1
            export PATH="$PATH:`pwd`/flutter/bin"
            echo "##vso[task.setvariable variable=path;isOutput=true]$PATH"
            flutter config --no-analytics
            yes | flutter doctor --android-licenses
      - task: CmdLine@2
        displayName: "flutter get"
        inputs:
          script: |
            flutter pub get

The solution is to add the BASH_ENV: "~/.profile" variable and put path in ~/.profile.

trigger:
  - master

variables:
  BASH_ENV: "~/.profile"

jobs:
  - job: Application
    pool:
      vmImage: ubuntu-latest
    steps:
      - task: CmdLine@2
        inputs:
          workingDirectory: $(Agent.ToolsDirectory)
          script: |
            git clone https://github.com/flutter/flutter.git -b stable --depth 1
            echo "export PATH=$PATH:`pwd`/flutter/bin" >> ~/.profile
            source ~/.profile
      - task: CmdLine@2
        inputs:
          script: |
            flutter config --no-analytics