keep_environment = ^FOO\d : BAR add_environment = ADDED1=added1 : ADDED2=added2 ADDED1=added1 ADDED2=added2 BAR=bar FOO1=foo1 FOO2=foo2 ADDED1 ADDED2 BAR FOO1 FOO2 Environment visible in Perl: ADDED1=added1 ADDED2=added2 BAR=bar FOO1=foo1 FOO2=foo2