Q&D way to visualize package dependencies

...using ​GraphViz

Smalltalk loadPackage: 'squeak:graphviz'

p := #'stx:libjava'. "The package which dependencies should be visualized"

gv := GraphViz new beDirected.
(ProjectDefinition definitionClassForPackage: p) preRequisites do:[:eachName |
    gv add: p -> eachName.
].
(ProjectDefinition definitionClassForPackage: p)  allPreRequisites do:[:eachName |
    | each |
    
    each := ProjectDefinition definitionClassForPackage: eachName.
    each effectivePreRequisites do:[:e |
        e ~~ #'stx:libbasic' ifTrue:[
            gv add: eachName -> e.
        ]
    ].
]. 
gv openInWindow.

The squeak:graphvz is distributed with Smalltalk/X jv-branch