Yarn-ui build fails in ARM docker looking for python2.

INFO] Exit code: 1
[INFO] Command: node install.js
[INFO] Arguments: 
[INFO] Directory: /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/phantomjs-prebuilt
[INFO] Output:
[INFO] PhantomJS not found on PATH
[INFO] Unexpected platform or architecture: linux/arm64
[INFO] It seems there is no binary available for your platform/architecture
[INFO] Try to install PhantomJS globally"
[INFO] error /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass: Command failed.
[INFO] error /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass: Command failed.info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
[INFO] Exit code: 1
[INFO] Command: node scripts/build.js
[INFO] Arguments: 
[INFO] Directory: /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass
[INFO] Output:
[INFO] Building: /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node/node /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass/node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
[INFO] gyp info it worked if it ends with ok
[INFO] gyp verb cli [
[INFO] gyp verb cli   '/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node/node',
[INFO] gyp verb cli   '/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass/node_modules/node-gyp/bin/node-gyp.js',
[INFO] gyp verb cli   'rebuild',
[INFO] gyp verb cli   '--verbose',
[INFO] gyp verb cli   '--libsass_ext=',
[INFO] gyp verb cli   '--libsass_cflags=',
[INFO] gyp verb cli   '--libsass_ldflags=',
[INFO] gyp verb cli   '--libsass_library='
[INFO] gyp verb cli ]
[INFO] gyp info using node-gyp@3.8.0
[INFO] gyp info using node@12.22.1 | linux | arm64
[INFO] gyp verb command rebuild []
[INFO] gyp verb command clean []
[INFO] gyp verb clean removing "build" directory
[INFO] gyp verb command configure []
[INFO] gyp verb check python checking for Python executable "python2" in the PATH
[INFO] gyp verb `which` failed Error: not found: python2
[INFO] gyp verb `which` failed     at getNotFoundError (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:13:12)
[INFO] gyp verb `which` failed     at F (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:68:19)
[INFO] gyp verb `which` failed     at E (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:80:29)
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:89:16
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/index.js:42:5
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/mode.js:8:5
[INFO] gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21)
[INFO] gyp verb `which` failed  python2 Error: not found: python2
[INFO] gyp verb `which` failed     at getNotFoundError (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:13:12)
[INFO] gyp verb `which` failed     at F (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:68:19)
[INFO] gyp verb `which` failed     at E (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:80:29)
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:89:16
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/index.js:42:5
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/mode.js:8:5
[INFO] gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21) {
[INFO] gyp verb `which` failed   code: 'ENOENT'
[INFO] gyp verb `which` failed }
[INFO] gyp verb check python checking for Python executable "python" in the PATH
[INFO] gyp verb `which` failed Error: not found: python
[INFO] gyp verb `which` failed     at getNotFoundError (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:13:12)
[INFO] gyp verb `which` failed     at F (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:68:19)
[INFO] gyp verb `which` failed     at E (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:80:29)
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:89:16
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/index.js:42:5
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/mode.js:8:5
[INFO] gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21)
[INFO] gyp verb `which` failed  python Error: not found: python
[INFO] gyp verb `which` failed     at getNotFoundError (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:13:12)
[INFO] gyp verb `which` failed     at F (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:68:19)
[INFO] gyp verb `which` failed     at E (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:80:29)
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:89:16
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/index.js:42:5
[INFO] gyp verb `which` failed     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/mode.js:8:5
[INFO] gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21) {
[INFO] gyp verb `which` failed   code: 'ENOENT'
[INFO] gyp verb `which` failed }
[INFO] gyp ERR! configure error 
[INFO] gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
[INFO] gyp ERR! stack     at PythonFinder.failNoPython (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass/node_modules/node-gyp/lib/configure.js:484:19)
[INFO] gyp ERR! stack     at PythonFinder.<anonymous> (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass/node_modules/node-gyp/lib/configure.js:406:16)
[INFO] gyp ERR! stack     at F (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:68:16)
[INFO] gyp ERR! stack     at E (/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:80:29)
[INFO] gyp ERR! stack     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/which/which.js:89:16
[INFO] gyp ERR! stack     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/index.js:42:5
[INFO] gyp ERR! stack     at /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/isexe/mode.js:8:5
[INFO] gyp ERR! stack     at FSReqCallback.oncomplete (fs.js:168:21)
[INFO] gyp ERR! System Linux 6.6.32-linuxkit
[INFO] gyp ERR! command "/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node/node" "/build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
[INFO] gyp ERR! cwd /build/source/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/target/webapp/node_modules/node-sass
[INFO] gyp ERR! node -v v12.22.1
[INFO] gyp ERR! node-gyp -v v3.8.0
[INFO] gyp ERR! not ok 
[INFO] Build failed with error code: 1
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for Apache Hadoop YARN UI 3.4.1:
[INFO] 
[INFO] Apache Hadoop YARN UI .............................. FAILURE [ 29.848 s]