No need to use source to run emsdk_env script

component/pyodide/buildout.cfg

@@ -122,7 +122,7 @@ script =
     {'cmd': disable_package_command + 'kiwisolver', 'cwd': self.options['build_dir']},
     {'cmd': 'python --version && make -C emsdk', 'cwd': self.options['build_dir']},
     {'cmd': 'sleep 5', 'cwd': self.options['build_dir']},
-    {'cmd': 'source ./emsdk/emsdk/emsdk_env.sh', 'cwd': self.options['build_dir']},
+    {'cmd': './emsdk/emsdk/emsdk_env.sh', 'cwd': self.options['build_dir']},
   ]
 
   for command in command_list:
@@ -229,7 +229,7 @@ configure-command = make -e
 make-binary =
 make-targets = cp -r ./* ${buildout:parts-directory}/${:_buildout_section_name_} 
 # configure-command = echo ${python3.7.2-PyYAML:location} && echo ${pyodide-cpython:path} && echo ${pyodide-emsdk:path} && echo ${node-uglify-js:location} && echo ${node-less:location}# ${pyodide-packages:path}
-configure-command = echo ${python3.7.2-PyYAML:location} && echo ${pyodide-script:path} # && echo ${pyodide-cpython:path} && echo ${pyodide-emsdk:path} && echo ${node-uglify-js:location} && echo ${node-less:location} && ${pyodide-packages:path}
+configure-command = echo ${python3.7.2-PyYAML:location} && echo ${pyodide-script:path}
 environment =
   PKG_CONFIG_PATH=${freetype:location}/lib/pkgconfig:${zlib:location}/lib/pkgconfig:${libpng:location}/lib/pkgconfig:$PKG_CONFIG_PATH
   PATH=${pkgconfig:location}/bin:${freetype:location}/bin:${nodejs:location}/bin/:${f2c:location}/bin:${python3.7.2:location}/bin:${cmake:location}/bin:${ccache:location}/bin:${gcc-8.2:location}/bin:${node-less:location}/node_modules/.bin:${node-uglify-js:location}/node_modules/.bin:${xz-utils:location}/bin:%(PATH)s