/usr/bin/ghc --numeric-version
looking for package tool: ghc-pkg near compiler in /usr/bin
found package tool in /usr/bin/ghc-pkg
/usr/bin/ghc-pkg --version
/usr/bin/ghc --supported-languages
Reading installed packages...
/usr/bin/ghc-pkg dump --global
/usr/bin/ghc-pkg dump --user
/usr/bin/ghc --print-libdir
Reading available packages...
Resolving dependencies...
selecting pandoc-1.5 (hackage) and discarding HTTP-3000.0.0, 3001.0.0,
3001.0.1, 3001.0.2, 3001.0.3, 3001.0.4, 3001.1.3, 3001.1.4, 3001.1.5,
4000.0.0, 4000.0.1, 4000.0.2, 4000.0.3, 4000.0.4, filepath-1.0, mtl-1.0,
parsec-2.0, 3.0.0, 3.0.1, 3.1.0, utf8-string-0.1, 0.2, xml-1.2.6, 1.3.1,
1.3.2, 1.3.3, 1.3.4, zip-archive-0.1, 0.1.1, 0.1.1.1, 0.1.1.2 and 0.1.1.3
selecting zip-archive-0.1.1.6 (installed or hackage) and discarding
bytestring-0.9, utf8-string-0.3, zip-archive-0.1.1.4 and 0.1.1.5
selecting texmath-0.3.0.2 (installed or hackage) and discarding texmath-0.1,
0.1.0.1, 0.1.0.2, 0.1.0.3, 0.1.0.4, 0.1.1, 0.2, 0.2.0.1, 0.2.0.2, 0.2.0.3,
0.2.0.4, 0.3 and 0.3.0.1
selecting utf8-string-0.3.5 (installed or hackage) and discarding
utf8-string-0.3.1, 0.3.1.1, 0.3.2, 0.3.3, 0.3.4 and 0.3.6
selecting xml-1.3.7 (installed or hackage) and discarding xml-1.3.5
selecting zlib-0.5.2.0 (installed or hackage) and discarding zlib-0.2, 0.3,
0.4, 0.4.0.1, 0.4.0.2, 0.4.0.3, 0.4.0.4 and 0.5.0.0
selecting digest-0.0.0.8 (installed or hackage) and discarding digest-0.0.0.1,
0.0.0.2, 0.0.0.3, 0.0.0.4, 0.0.0.5, 0.0.0.6 and 0.0.0.7
selecting xhtml-3000.2.0.1 (installed or hackage) and discarding
xhtml-3000.0.0, 3000.0.1, 3000.0.2.1, 3000.0.2.2, 3000.1.0.0 and 3000.2.0.0
selecting binary-0.5.0.1 (installed or hackage) and discarding binary-0.2,
0.3, 0.4, 0.4.1, 0.4.2, 0.4.3, 0.4.3.1, 0.4.4, 0.5 and 0.5.0.2
selecting extensible-exceptions-0.1.1.0 (installed or hackage) and discarding
extensible-exceptions-0.1.0.1, 0.1.1.1 and 0.1.1.2
selecting HTTP-4000.0.9 (installed or hackage) and discarding HTTP-4000.0.5,
4000.0.6, 4000.0.7 and 4000.0.8
selecting network-2.2.1.4 (installed or hackage) and discarding network-2.0,
2.1.0.0, 2.2.0.0, 2.2.0.1, 2.2.1, 2.2.1.1, 2.2.1.2, 2.2.1.3, 2.2.1.5, 2.2.1.6
and 2.2.1.7
selecting parsec-2.1.0.1 (installed or hackage) and discarding parsec-2.1.0.0
selecting mtl-1.1.0.2 (installed or hackage) and discarding mtl-1.1.0.0,
1.1.0.1 and 1.1.1.0
selecting process-1.0.1.1 (installed or hackage) and discarding
process-1.0.0.0, 1.0.1.2 and 1.0.1.3
selecting pretty-1.0.1.0 (installed or hackage) and discarding pretty-1.0.0.0
and 1.0.1.1
selecting directory-1.0.0.3 (installed or hackage) and discarding
directory-1.0.0.0, 1.0.1.0, 1.0.1.1 and 1.0.1.2
selecting unix-2.3.2.0 (installed or hackage) and discarding unix-2.0,
2.2.0.0, 2.3.0.0, 2.3.1.0, 2.4.0.0, 2.4.0.1 and 2.4.0.2
selecting bytestring-0.9.1.4 (installed or hackage) and discarding
bytestring-0.9.0.1, 0.9.0.2, 0.9.0.3, 0.9.0.4, 0.9.1.0, 0.9.1.1, 0.9.1.2,
0.9.1.3, 0.9.1.5, 0.9.1.6 and 0.9.1.7
selecting ghc-prim-0.1.0.0 (installed)
selecting rts-1.0 (installed)
selecting filepath-1.1.0.2 (installed or hackage) and discarding
filepath-1.1.0.0, 1.1.0.1, 1.1.0.3 and 1.1.0.4
selecting old-time-1.0.0.2 (installed or hackage) and discarding
old-time-1.0.0.0, 1.0.0.3, 1.0.0.4 and 1.0.0.5
selecting old-locale-1.0.0.2 (installed or hackage) and discarding
old-locale-1.0.0.0 and 1.0.0.1
selecting containers-0.2.0.1 (installed or hackage) and discarding
containers-0.1.0.0, 0.1.0.1, 0.2.0.0 and 0.3.0.0
selecting array-0.2.0.0 (installed or hackage) and discarding array-0.1.0.0,
0.3.0.0 and 0.3.0.1
selecting base-4.1.0.0 (installed) and 3.0.3.1 (installed) and discarding
syb-0.1.0.0, 0.1.0.1, 0.1.0.2, 0.1.0.3, 0.2 and 0.2.1
selecting integer-0.1.0.1 (installed)
selecting syb-0.1.0.1 (installed)
In order, the following would be installed:
old-time-1.0.0.2 (reinstall) changes: old-locale-1.0.0.1 -> 1.0.0.2
HTTP-4000.0.9 (reinstall)
directory-1.0.0.3 (reinstall)
process-1.0.1.1 (reinstall)
zip-archive-0.1.1.6 (reinstall)
pandoc-1.5 (new version)