sandbox.out

# cabal v1-sandbox init
Writing a default package environment file to <ROOT>/sandbox.dist/cabal.sandbox.config
Creating a new sandbox at <ROOT>/sandbox.dist/sandbox
# cabal v1-install
Resolving dependencies...
Configuring my-foreign-lib-0.1.0.0...
Preprocessing foreign library 'myforeignlib' for my-foreign-lib-0.1.0.0..
Building foreign library 'myforeignlib' for my-foreign-lib-0.1.0.0..
Installing foreign library myforeignlib in <PATH>
Completed    my-foreign-lib-0.1.0.0
# cabal v1-exec
Hi from a foreign library! Foo has value 5678