dwarf-fortress-full, nixos.qt5.full, and qtquickcontrols conflict

[arafangion]

Issue description

Installing multiple packages that use Qt tend to conflict.

Eg, as follows:

> nix-env -i qtquickcontrols
installing 'qtquickcontrols-5.11.1'
building '/nix/store/4m8zagapydrnq4ysnw5hib4znvkyr9p9-user-environment.drv'...
error: packages '/nix/store/cz50vrb5f6f1vpw10gx6kj2p5gil5b8z-qt-full-5.11.1/lib/qt-5.11/qml/QtQuick/PrivateWidgets/plugins.qmltypes' and '/nix/store/c25b88nw7a2r3sl16nxxcpfyxdv8341m-qtquickcontrols-5.11.1/lib/qt-5.11/qml/QtQuick/PrivateWidgets/plugins.qmltypes' have the same priority 5; use 'nix-env --set-flag priority NUMBER INSTALLED_PKGNAME' to change the priority of one of the conflicting packages (0 being the highest priority)
builder for '/nix/store/4m8zagapydrnq4ysnw5hib4znvkyr9p9-user-environment.drv' failed with exit code 1
error: build of '/nix/store/4m8zagapydrnq4ysnw5hib4znvkyr9p9-user-environment.drv' failed

Steps to reproduce

nix-env -i dwarf-fortress-full nix-env -i nixos.qt5.full nix-env -i qtquickcontrols

Technical details

Please run nix-shell -p nix-info --run "nix-info -m" and paste the results.

 - system: `"x86_64-linux"`
 - host os: `Linux 4.14.76, NixOS, 18.09.1446.db561c90ef3 (Jellyfish)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.1.3`
 - channels(root): `"nixos-18.09.1446.db561c90ef3"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[Ekleog]

cc @ttuegel

This sounds like a widespread Qt packaging issue to me, is there a reason why the whole /lib/qt5-11 directory is duplicated? (the conflict was also reported to trigger between dwarf-fortress-full and qtdeclarative on IRC, so the issue is not just installing qt5.full)

[matthewbauer]

Can you try this patch:

diff --git a/pkgs/development/libraries/qt-5/qt-env.nix b/pkgs/development/libraries/qt-5/qt-env.nix
index 49585f601d1..60fa977fe2d 100644
--- a/pkgs/development/libraries/qt-5/qt-env.nix
+++ b/pkgs/development/libraries/qt-5/qt-env.nix
@@ -18,4 +18,6 @@ buildEnv {
     Documentation = ${qtbase.qtDocPrefix}
     EOF
   '';
+
+  meta.priority = 10;
 }

?

[arafangion]

Hello @matthewbauer: That patch might work, I ended up setting up the priority explicitly for the packages I was using.

However, for which of dwarf-fortress-full, nixos.qt5.full, and qtquickcontrols would it resolve, or wouldn't it set the meta.priority to 10 for all of them, bringing us back to square one?

[ttuegel]

Installing qt5.full and qtquickcontrols is expected to conflict. I can't say yet why dwarf-fortress-full would be involved, I will have to look at that more.

[stale[bot]]

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