Hello, I'm trying to understand Cabal dependencies. Why does the following situation happen? # cabal install xmobar --dry-run Resolving dependencies... In order, the following would be installed: parsec-3.1.3 (reinstall) changes: mtl-2.1.1 -> 2.0.1.0 xmobar-0.15 (new package) Warning: The following packages are likely to be broken by the reinstalls: texmath-0.6.1.1 regex-tdfa-1.1.8 Unixutils-1.50 network-2.4.0.1 HTTP-4000.2.5 network-2.3.0.14 sendfile-0.7.6 happstack-server-7.0.7 happstack-hsp-7.1.0 happstack-7.0.0 hslogger-1.1.5 citeproc-hs-0.3.4 acid-state-0.6.4 HTTP-4000.2.3 ltk-0.12.1.0 json-0.5 highlighting-kate-0.5.1 Use --force-reinstalls if you want to install anyway. Best regards, José -- José António Branquinho de Oliveira Lopes Instituto Superior Técnico Technical University of Lisbon