虚包：libghc-graphviz-dev-2999.20.2.0-a08c9
This is a virtual package. See the Debian policy for a definition of virtual packages.
负责填实 libghc-graphviz-dev-2999.20.2.0-a08c9 的软件包
- libghc-graphviz-dev
- bindings to Graphviz for graph visualization
This is a virtual package. See the Debian policy for a definition of virtual packages.