[Long] Re: [Haskell-cafe] Re: Why cabal forces reinstallation of happstack-utils?

On Wed, 2010-05-05 at 12:13 +1000, Ivan Miljenovic wrote:

On 5 May 2010 12:04, Maciej Piechotka wrote:

...

1. I downloaded happstack-utile[1] 2. Edited cabal file 3. Installed it successfully linking with parsec 3.1 4. I tried to run cabal install happstack --constraint 'parsec >= 3' 5. It complains that happstack-utile needs to be installed against parsec 2

...

[1] Now it is HStringTemplate but problem is the same

Did you try editing the HStringTemplate cabal file to remove its constraint against parsec >= 3?

Yes. See point 2.

Also, is there any reason why you're forcing that constraint through (yes, upstream should start using parec-3, but why use --constraint to try and force it yourself)?

=3

=3 mpiechotka@localhost ~ % cabal install happstack -dry-run -v unrecognized option `-dry-run' mpiechotka@localhost ~ % cabal install happstack --dry-run -v /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 happstack-0.5.0 (hackage) and discarding HStringTemplate-0.2, 0.3, 0.3.1, 0.3.2, 0.4, 0.4.1, 0.4.2, happstack-0.2.1, 0.3.1, 0.3.2, 0.4.1, happstack-data-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.4.1, happstack-ixset-0.1, 0.2.1, 0.3.1, 0.3.2, 0.4.1, happstack-server-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.4.1, happstack-state-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.1, happstack-util-0.1, 0.2.1, 0.3.1, 0.3.2, 0.4.1, harp-0.2.1, hsp-0.2, 0.4, 0.4.4, 0.4.5, 0.5.0, 0.5.1, hsx-0.4, 0.4.4, 0.4.5, 0.4.6, 0.4.8, 0.5.0, 0.5.1, 0.5.2, 0.5.5, 0.5.6, 0.6.0, 0.6.1 and 0.6.2 selecting happstack-data-0.5.0 (hackage) and discarding HaXml-1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.19.5, 1.19.6, 1.19.7, 1.20, 1.20.1, 1.20.2, syb-with-class-0.1, 0.2, 0.3, 0.4, 0.5, 0.5.1, 0.6, text-0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.7.0.1, time-1.0, 1.1.2.0, 1.1.2.1, 1.1.2.2, 1.1.2.3, 1.1.2.4 and 1.1.3 selecting happstack-server-0.5.0 (hackage) and discarding sendfile-0.1, 0.2, 0.3, 0.3.1, 0.4, 0.5, utf8-string-0.1, 0.2, 0.3, 0.3.1, 0.3.1.1, 0.3.2 and 0.3.3 selecting happstack-state-0.5.0 (hackage) selecting harp-0.4 (installed or hackage) selecting hsp-0.5.2 (installed or hackage) and discarding HJScript-0.4, 0.4.4, 0.4.5, 0.4.6, 0.4.7, 0.4.8 and 0.4.9 selecting HJScript-0.5.0 (installed or hackage) and discarding HJavaScript-0.4, 0.4.4 and 0.4.5 selecting hsx-0.7.0 (installed or hackage) and discarding haskell-src-exts-0.2.1, 0.3.2, 0.3.3, 0.3.4, 0.3.5, 0.3.7, 0.3.9, 0.3.10, 0.3.11, 0.3.12, 0.4.1, 0.4.2, 0.4.3, 0.4.3.1, 0.4.4, 0.4.4.1, 0.4.5, 0.4.6, 0.4.8, 0.5.2, 0.5.3, 0.5.4, 0.5.5, 0.5.6, 0.5.7, 1.0.0, 1.0.1, 1.1.0, 1.1.1, 1.1.3, 1.1.3.1, 1.1.4, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5 and 1.4.0 selecting sendfile-0.6.1 (hackage) selecting syb-with-class-0.6.1 (installed or hackage) and discarding template-haskell-2.2.0.0, 2.3.0.0 and 2.3.0.1 selecting syb-with-class-instances-text-0.0.1 (installed or hackage) selecting text-0.7.1.0 (installed or hackage) and discarding deepseq-1.0.0.0 selecting deepseq-1.1.0.0 (installed or hackage) and discarding array-0.1.0.0, containers-0.1.0.0 and 0.1.0.1 selecting ghc-prim-0.2.0.0 (installed) selecting ffi-1.0 (installed) selecting rts-1.0 (installed) 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 html-1.0.1.2 (installed or hackage) and discarding html-1.0 and 1.0.1.1 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 stm-2.1.1.2 (installed or hackage) and discarding stm-2.1, 2.1.1.0 and 2.1.2.0 selecting happstack-ixset-0.5.0.1 (hackage) and discarding happstack-ixset-0.5.0 selecting happstack-util-0.5.0.1 (installed or hackage) and discarding SMTPClient-0.1, 0.2, 0.3, 1.0, 1.0.1, happstack-util-0.5.0, network-2.0 and 2.1.0.0 selecting SMTPClient-1.0.2 (installed or hackage) and discarding hsemail-1.0, 1.1, 1.2, 1.3, 1.4 and 1.5 selecting hsemail-1.6 (installed or hackage) selecting unix-compat-0.1.2.1 (installed or hackage) and discarding unix-compat-0.1, 0.1.1 and 0.1.2.0 selecting strict-concurrency-0.2.3 (installed or hackage) and discarding strict-concurrency-0.1, 0.2, 0.2.1 and 0.2.2 selecting hslogger-1.0.10 (installed or hackage) and discarding hslogger-1.0.2, 1.0.4, 1.0.5, 1.0.6, 1.0.7 and 1.0.9 selecting binary-0.5.0.2 (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 0.5.0.1 selecting MaybeT-0.1.2 (hackage) and discarding MaybeT-0.1.0 and 0.1.1 selecting HaXml-1.13.3 (hackage) and discarding HaXml-1.13.2 selecting network-2.2.1.7 (installed or hackage) and discarding network-2.2.0.0, 2.2.0.1, 2.2.1, 2.2.1.1, 2.2.1.2, 2.2.1.3, 2.2.1.4, 2.2.1.5 and 2.2.1.6 selecting HStringTemplate-0.6.2 (installed or hackage) and discarding HStringTemplate-0.4.3, 0.5, 0.5.1, 0.5.1.1, 0.5.1.2, 0.5.1.3, 0.6, 0.6.1,

=3

Because it would download and rebuild packages on its own: % cabal install happstack --dry-run -v /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 happstack-0.5.0 (hackage) and discarding HStringTemplate-0.2, 0.3, 0.3.1, 0.3.2, 0.4, 0.4.1, 0.4.2, happstack-0.2.1, 0.3.1, 0.3.2, 0.4.1, happstack-data-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.4.1, happstack-ixset-0.1, 0.2.1, 0.3.1, 0.3.2, 0.4.1, happstack-server-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.4.1, happstack-state-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.1, happstack-util-0.1, 0.2.1, 0.3.1, 0.3.2, 0.4.1, harp-0.2.1, hsp-0.2, 0.4, 0.4.4, 0.4.5, 0.5.0, 0.5.1, hsx-0.4, 0.4.4, 0.4.5, 0.4.6, 0.4.8, 0.5.0, 0.5.1, 0.5.2, 0.5.5, 0.5.6, 0.6.0, 0.6.1 and 0.6.2 selecting happstack-data-0.5.0 (hackage) and discarding HaXml-1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.19.5, 1.19.6, 1.19.7, 1.20, 1.20.1, 1.20.2, syb-with-class-0.1, 0.2, 0.3, 0.4, 0.5, 0.5.1, 0.6, text-0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.7.0.1, time-1.0, 1.1.2.0, 1.1.2.1, 1.1.2.2, 1.1.2.3, 1.1.2.4 and 1.1.3 selecting happstack-server-0.5.0 (hackage) and discarding sendfile-0.1, 0.2, 0.3, 0.3.1, 0.4, 0.5, utf8-string-0.1, 0.2, 0.3, 0.3.1, 0.3.1.1, 0.3.2 and 0.3.3 selecting happstack-state-0.5.0 (hackage) selecting harp-0.4 (installed or hackage) selecting hsp-0.5.2 (installed or hackage) and discarding HJScript-0.4, 0.4.4, 0.4.5, 0.4.6, 0.4.7, 0.4.8 and 0.4.9 selecting HJScript-0.5.0 (installed or hackage) and discarding HJavaScript-0.4, 0.4.4 and 0.4.5 selecting hsx-0.7.0 (installed or hackage) and discarding haskell-src-exts-0.2.1, 0.3.2, 0.3.3, 0.3.4, 0.3.5, 0.3.7, 0.3.9, 0.3.10, 0.3.11, 0.3.12, 0.4.1, 0.4.2, 0.4.3, 0.4.3.1, 0.4.4, 0.4.4.1, 0.4.5, 0.4.6, 0.4.8, 0.5.2, 0.5.3, 0.5.4, 0.5.5, 0.5.6, 0.5.7, 1.0.0, 1.0.1, 1.1.0, 1.1.1, 1.1.3, 1.1.3.1, 1.1.4, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5 and 1.4.0 selecting sendfile-0.6.1 (hackage) selecting syb-with-class-0.6.1 (installed or hackage) and discarding template-haskell-2.2.0.0, 2.3.0.0 and 2.3.0.1 selecting syb-with-class-instances-text-0.0.1 (installed or hackage) selecting text-0.7.1.0 (installed or hackage) and discarding deepseq-1.0.0.0 selecting deepseq-1.1.0.0 (installed or hackage) and discarding array-0.1.0.0, containers-0.1.0.0 and 0.1.0.1 selecting ghc-prim-0.2.0.0 (installed) selecting ffi-1.0 (installed) selecting rts-1.0 (installed) 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 html-1.0.1.2 (installed or hackage) and discarding html-1.0 and 1.0.1.1 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 stm-2.1.1.2 (installed or hackage) and discarding stm-2.1, 2.1.1.0 and 2.1.2.0 selecting happstack-ixset-0.5.0.1 (hackage) and discarding happstack-ixset-0.5.0 selecting happstack-util-0.5.0.1 (installed or hackage) and discarding SMTPClient-0.1, 0.2, 0.3, 1.0, 1.0.1, happstack-util-0.5.0, network-2.0 and 2.1.0.0 selecting SMTPClient-1.0.2 (installed or hackage) and discarding hsemail-1.0, 1.1, 1.2, 1.3, 1.4 and 1.5 selecting hsemail-1.6 (installed or hackage) selecting unix-compat-0.1.2.1 (installed or hackage) and discarding unix-compat-0.1, 0.1.1 and 0.1.2.0 selecting strict-concurrency-0.2.3 (installed or hackage) and discarding strict-concurrency-0.1, 0.2, 0.2.1 and 0.2.2 selecting hslogger-1.0.10 (installed or hackage) and discarding hslogger-1.0.2, 1.0.4, 1.0.5, 1.0.6, 1.0.7 and 1.0.9 selecting binary-0.5.0.2 (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 0.5.0.1 selecting MaybeT-0.1.2 (hackage) and discarding MaybeT-0.1.0 and 0.1.1 selecting HaXml-1.13.3 (hackage) and discarding HaXml-1.13.2 selecting network-2.2.1.7 (installed or hackage) and discarding network-2.2.0.0, 2.2.0.1, 2.2.1, 2.2.1.1, 2.2.1.2, 2.2.1.3, 2.2.1.4, 2.2.1.5 and 2.2.1.6 selecting HStringTemplate-0.6.2 (installed or hackage) and discarding HStringTemplate-0.4.3, 0.5, 0.5.1, 0.5.1.1, 0.5.1.2, 0.5.1.3, 0.6, 0.6.1, parsec-3.0.0, 3.0.1 and 3.1.0 selecting parsec-2.1.0.1 (installed or hackage) and discarding parsec-2.0 and 2.1.0.0 selecting parallel-2.2.0.1 (installed or hackage) and discarding parallel-1.0.0.0, 1.0.0.1, 1.1.0.0, 1.1.0.1, 2.0.0.0, 2.1.0.0 and 2.2.0.0 selecting utf8-string-0.3.6 (installed or hackage) and discarding utf8-string-0.3.4 and 0.3.5 selecting haskell-src-exts-1.8.2 (installed or hackage) and discarding haskell-src-exts-1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.6.0, 1.6.1, 1.7.0, 1.7.1, 1.7.2, 1.8.0, 1.8.1 and 1.9.0 selecting cpphs-1.11 (installed or hackage) and discarding cpphs-1.3, 1.5, 1.6, 1.7, 1.8, 1.9 and 1.10 selecting haskell98-1.0.1.1 (installed or hackage) and discarding haskell98-1.0 and 1.0.1.0 selecting HJavaScript-0.4.7 (installed or hackage) and discarding HJavaScript-0.4.6 selecting HUnit-1.2.2.1 (installed or hackage) and discarding HUnit-1.1, 1.2.0.0, 1.2.0.1, 1.2.0.2, 1.2.0.3 and 1.2.2.0 selecting random-1.0.0.2 (installed or hackage) and discarding random-1.0.0.0 and 1.0.0.1 selecting time-1.1.4 (installed or hackage) and discarding time-1.2, 1.2.0.1 and 1.2.0.2 selecting template-haskell-2.4.0.1 (installed or hackage) and discarding template-haskell-2.4.0.0 selecting bytestring-0.9.1.6 (installed or hackage) and discarding bytestring-0.9, 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, 0.9.1.4 and 0.9.1.5 selecting extensible-exceptions-0.1.1.2 (installed or hackage) and discarding extensible-exceptions-0.1.0.1, 0.1.1.0 and 0.1.1.1 selecting mtl-1.1.0.2 (installed or hackage) and discarding mtl-1.0, 1.1.0.0 and 1.1.0.1 selecting process-1.0.1.2 (installed or hackage) and discarding filepath-1.0, process-1.0.0.0 and 1.0.1.1 selecting pretty-1.0.1.1 (installed or hackage) and discarding pretty-1.0.0.0 and 1.0.1.0 selecting directory-1.0.1.1 (installed or hackage) and discarding directory-1.0.0.0, 1.0.0.3 and 1.0.1.0 selecting unix-2.4.0.1 (installed or hackage) and discarding unix-2.0, 2.2.0.0, 2.3.0.0, 2.3.1.0, 2.3.2.0 and 2.4.0.0 selecting old-time-1.0.0.4 (installed or hackage) and discarding old-time-1.0.0.0, 1.0.0.2 and 1.0.0.3 selecting old-locale-1.0.0.2 (installed or hackage) and discarding old-locale-1.0.0.0 and 1.0.0.1 selecting filepath-1.1.0.4 (installed or hackage) and discarding filepath-1.1.0.0, 1.1.0.1, 1.1.0.2 and 1.1.0.3 selecting containers-0.3.0.0 (installed or hackage) and discarding containers-0.2.0.0 and 0.2.0.1 selecting array-0.3.0.0 (installed or hackage) and discarding array-0.2.0.0 selecting base-3.0.3.2 (installed) and 4.2.0.1 (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-gmp-0.2.0.1 (installed) selecting syb-0.1.0.2 (installed) In order, the following would be installed: HStringTemplate-0.6.2 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 HaXml-1.13.3 (new version) MaybeT-0.1.2 (new package) hsemail-1.6 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 network-2.2.1.7 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 SMTPClient-1.0.2 (reinstall) hslogger-1.0.10 (reinstall) happstack-util-0.5.0.1 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 happstack-data-0.5.0 (new package) happstack-ixset-0.5.0.1 (new package) happstack-state-0.5.0 (new package) sendfile-0.6.1 (new package) happstack-server-0.5.0 (new package) happstack-0.5.0 (new package) cabal install happstack --constraint 'parsec >= 3' Resolving dependencies... cabal: cannot configure HStringTemplate-0.6.2. It requires parsec <3 For the dependency on parsec <3 there are these packages: parsec-2.0, parsec-2.1.0.0 and parsec-2.1.0.1. However none of them are available. parsec-2.0 was excluded because of the top level dependency parsec >=3 parsec-2.1.0.0 was excluded because of the top level dependency parsec parsec-2.1.0.1 was excluded because of the top level dependency parsec parsec-3.0.0, 3.0.1 and 3.1.0 selecting parsec-2.1.0.1 (installed or hackage) and discarding parsec-2.0 and 2.1.0.0 selecting parallel-2.2.0.1 (installed or hackage) and discarding parallel-1.0.0.0, 1.0.0.1, 1.1.0.0, 1.1.0.1, 2.0.0.0, 2.1.0.0 and 2.2.0.0 selecting utf8-string-0.3.6 (installed or hackage) and discarding utf8-string-0.3.4 and 0.3.5 selecting haskell-src-exts-1.8.2 (installed or hackage) and discarding haskell-src-exts-1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.6.0, 1.6.1, 1.7.0, 1.7.1, 1.7.2, 1.8.0, 1.8.1 and 1.9.0 selecting cpphs-1.11 (installed or hackage) and discarding cpphs-1.3, 1.5, 1.6, 1.7, 1.8, 1.9 and 1.10 selecting haskell98-1.0.1.1 (installed or hackage) and discarding haskell98-1.0 and 1.0.1.0 selecting HJavaScript-0.4.7 (installed or hackage) and discarding HJavaScript-0.4.6 selecting HUnit-1.2.2.1 (installed or hackage) and discarding HUnit-1.1, 1.2.0.0, 1.2.0.1, 1.2.0.2, 1.2.0.3 and 1.2.2.0 selecting random-1.0.0.2 (installed or hackage) and discarding random-1.0.0.0 and 1.0.0.1 selecting time-1.1.4 (installed or hackage) and discarding time-1.2, 1.2.0.1 and 1.2.0.2 selecting template-haskell-2.4.0.1 (installed or hackage) and discarding template-haskell-2.4.0.0 selecting bytestring-0.9.1.6 (installed or hackage) and discarding bytestring-0.9, 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, 0.9.1.4 and 0.9.1.5 selecting extensible-exceptions-0.1.1.2 (installed or hackage) and discarding extensible-exceptions-0.1.0.1, 0.1.1.0 and 0.1.1.1 selecting mtl-1.1.0.2 (installed or hackage) and discarding mtl-1.0, 1.1.0.0 and 1.1.0.1 selecting process-1.0.1.2 (installed or hackage) and discarding filepath-1.0, process-1.0.0.0 and 1.0.1.1 selecting pretty-1.0.1.1 (installed or hackage) and discarding pretty-1.0.0.0 and 1.0.1.0 selecting directory-1.0.1.1 (installed or hackage) and discarding directory-1.0.0.0, 1.0.0.3 and 1.0.1.0 selecting unix-2.4.0.1 (installed or hackage) and discarding unix-2.0, 2.2.0.0, 2.3.0.0, 2.3.1.0, 2.3.2.0 and 2.4.0.0 selecting old-time-1.0.0.4 (installed or hackage) and discarding old-time-1.0.0.0, 1.0.0.2 and 1.0.0.3 selecting old-locale-1.0.0.2 (installed or hackage) and discarding old-locale-1.0.0.0 and 1.0.0.1 selecting filepath-1.1.0.4 (installed or hackage) and discarding filepath-1.1.0.0, 1.1.0.1, 1.1.0.2 and 1.1.0.3 selecting containers-0.3.0.0 (installed or hackage) and discarding containers-0.2.0.0 and 0.2.0.1 selecting array-0.3.0.0 (installed or hackage) and discarding array-0.2.0.0 selecting base-3.0.3.2 (installed) and 4.2.0.1 (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-gmp-0.2.0.1 (installed) selecting syb-0.1.0.2 (installed) In order, the following would be installed: HStringTemplate-0.6.2 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 HaXml-1.13.3 (new version) MaybeT-0.1.2 (new package) hsemail-1.6 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 network-2.2.1.7 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 SMTPClient-1.0.2 (reinstall) hslogger-1.0.10 (reinstall) happstack-util-0.5.0.1 (reinstall) changes: parsec-3.1.0 -> 2.1.0.1 happstack-data-0.5.0 (new package) happstack-ixset-0.5.0.1 (new package) happstack-state-0.5.0 (new package) sendfile-0.6.1 (new package) happstack-server-0.5.0 (new package) happstack-0.5.0 (new package) mpiechotka@localhost ~ % cabal install happstack --constraint 'parsec >= 3' -v --dry-run /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 happstack-0.5.0 (hackage) and discarding HStringTemplate-0.2, 0.3, 0.3.1, 0.3.2, 0.4, 0.4.1, 0.4.2, happstack-0.2.1, 0.3.1, 0.3.2, 0.4.1, happstack-data-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.4.1, happstack-ixset-0.1, 0.2.1, 0.3.1, 0.3.2, 0.4.1, happstack-server-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.4.1, happstack-state-0.1, 0.2.1, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.1, happstack-util-0.1, 0.2.1, 0.3.1, 0.3.2, 0.4.1, harp-0.2.1, hsp-0.2, 0.4, 0.4.4, 0.4.5, 0.5.0, 0.5.1, hsx-0.4, 0.4.4, 0.4.5, 0.4.6, 0.4.8, 0.5.0, 0.5.1, 0.5.2, 0.5.5, 0.5.6, 0.6.0, 0.6.1 and 0.6.2 selecting happstack-data-0.5.0 (hackage) and discarding HaXml-1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.19.5, 1.19.6, 1.19.7, 1.20, 1.20.1, 1.20.2, syb-with-class-0.1, 0.2, 0.3, 0.4, 0.5, 0.5.1, 0.6, text-0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.7.0.1, time-1.0, 1.1.2.0, 1.1.2.1, 1.1.2.2, 1.1.2.3, 1.1.2.4 and 1.1.3 selecting happstack-server-0.5.0 (hackage) and discarding sendfile-0.1, 0.2, 0.3, 0.3.1, 0.4, 0.5, utf8-string-0.1, 0.2, 0.3, 0.3.1, 0.3.1.1, 0.3.2 and 0.3.3 selecting happstack-state-0.5.0 (hackage) selecting harp-0.4 (installed or hackage) selecting hsp-0.5.2 (installed or hackage) and discarding HJScript-0.4, 0.4.4, 0.4.5, 0.4.6, 0.4.7, 0.4.8 and 0.4.9 selecting HJScript-0.5.0 (installed or hackage) and discarding HJavaScript-0.4, 0.4.4 and 0.4.5 selecting hsx-0.7.0 (installed or hackage) and discarding haskell-src-exts-0.2.1, 0.3.2, 0.3.3, 0.3.4, 0.3.5, 0.3.7, 0.3.9, 0.3.10, 0.3.11, 0.3.12, 0.4.1, 0.4.2, 0.4.3, 0.4.3.1, 0.4.4, 0.4.4.1, 0.4.5, 0.4.6, 0.4.8, 0.5.2, 0.5.3, 0.5.4, 0.5.5, 0.5.6, 0.5.7, 1.0.0, 1.0.1, 1.1.0, 1.1.1, 1.1.3, 1.1.3.1, 1.1.4, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5 and 1.4.0 selecting sendfile-0.6.1 (hackage) selecting syb-with-class-0.6.1 (installed or hackage) and discarding template-haskell-2.2.0.0, 2.3.0.0 and 2.3.0.1 selecting syb-with-class-instances-text-0.0.1 (installed or hackage) selecting text-0.7.1.0 (installed or hackage) and discarding deepseq-1.0.0.0 selecting deepseq-1.1.0.0 (installed or hackage) and discarding array-0.1.0.0, containers-0.1.0.0 and 0.1.0.1 selecting ghc-prim-0.2.0.0 (installed) selecting ffi-1.0 (installed) selecting rts-1.0 (installed) 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 html-1.0.1.2 (installed or hackage) and discarding html-1.0 and 1.0.1.1 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 stm-2.1.1.2 (installed or hackage) and discarding stm-2.1, 2.1.1.0 and 2.1.2.0 selecting happstack-ixset-0.5.0.1 (hackage) and discarding happstack-ixset-0.5.0 selecting happstack-util-0.5.0.1 (installed or hackage) and discarding SMTPClient-0.1, 0.2, 0.3, 1.0, 1.0.1, happstack-util-0.5.0, network-2.0 and 2.1.0.0 selecting SMTPClient-1.0.2 (installed or hackage) and discarding hsemail-1.0, 1.1, 1.2, 1.3, 1.4 and 1.5 selecting hsemail-1.6 (installed or hackage) selecting unix-compat-0.1.2.1 (installed or hackage) and discarding unix-compat-0.1, 0.1.1 and 0.1.2.0 selecting strict-concurrency-0.2.3 (installed or hackage) and discarding strict-concurrency-0.1, 0.2, 0.2.1 and 0.2.2 selecting hslogger-1.0.10 (installed or hackage) and discarding hslogger-1.0.2, 1.0.4, 1.0.5, 1.0.6, 1.0.7 and 1.0.9 selecting binary-0.5.0.2 (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 0.5.0.1 selecting MaybeT-0.1.2 (hackage) and discarding MaybeT-0.1.0 and 0.1.1 selecting HaXml-1.13.3 (hackage) and discarding HaXml-1.13.2 selecting network-2.2.1.7 (installed or hackage) and discarding network-2.2.0.0, 2.2.0.1, 2.2.1, 2.2.1.1, 2.2.1.2, 2.2.1.3, 2.2.1.4, 2.2.1.5 and 2.2.1.6 selecting cabal: cannot configure HStringTemplate-0.6.2. It requires parsec <3 For the dependency on parsec <3 there are these packages: parsec-2.0, parsec-2.1.0.0 and parsec-2.1.0.1. However none of them are available. parsec-2.0 was excluded because of the top level dependency parsec >=3 parsec-2.1.0.0 was excluded because of the top level dependency parsec parsec-2.1.0.1 was excluded because of the top level dependency parsec

=3

And if you mean why I use it in general - I'm using parsec 3 in packages which depends on, among others, network.

...

If I just run: % runhaskell Setup.hs configure --user All seems to be ok but % cabal install Wants to reinstall packages (or complains about constraints).

Note that with its dependency resolution stuff, cabal-install tries to ensure you have an entire working and consistent set of dependencies, whereas doing it manually will happily break everything.

...

It is not a missing dependency. It is that the cabal-install tries to use dependencies from hackage instead of installed packages.

Not quite: if its already installed and working, cabal-install will use it; if there is some inconsistency (e.g. package Foo was built against Bar-x but you now have Bar-y installed) then cabal-install will try rebuilding that package; note that if you installed it from a local edited repository then cabal-install doesn't know this and will get the official hackage version.

Everything is working. Not rebuilding HStringTemplate/happstack-utils would perfectly work as they are build against parsec 3 and etc. % ghc-pkg check % It tries to install it regardless of if it is broken or not.

Also, I note that you seem to use the Gentoo Haskell overlay (as you've made bug reports about it) but you're also building packages by hand; this can also lead to problems (don't mix your packages kids!).

Possibly but: - I'd like to have gtk2hs, haskell-platform and ghc on system level instead of compiling it on my own. With exception of darcs i'm not using anything else from there. - Haskell overlay don't have all packages I need sufficiently fast. Well - it don't have everything I need in the first place. Regards