Nixpkgs: Graphical ISOs and OVAs are too large

[matthewbauer]

Issue description

The graphical ISO and OVA files are about 1.1 GB. This is too big and can probably be made smaller. From nixos-18.09beta521.e4966591ef6-x86_64-linux.ova:

$ du -sch /nix/store/*
51M     /nix/store/6b6lzbq74g95j8qlbrdjzkn2ghh81mgy-python-2.7.15
53M     /nix/store/4rv37m88jmjiqpr9d4r2s0r2c4cxmcpm-spidermonkey-52.9.0
55M     /nix/store/z6kbqvfdv48vxcmzsnmdy24q2dbxjygp-plasma-desktop-5.13.4
57M     /nix/store/2iq0jp4m5nmak16gsgbaypqg92p96a4k-samba-4.7.9
57M     /nix/store/q9ajsngf2w3r10dg7b1148wzq1avp4gj-perl-5.28.0
58M     /nix/store/zsp6g66hr0l4dgllj56ah9jk19v5nz4v-qtwebkit-5.212-alpha-01-26-2018
64M     /nix/store/hy65mn4wjswqih75gfr6g4q3xgqdm325-python3-3.6.6
67M     /nix/store/kr3qbmrx11sj4zccg1g9glsb3rby626q-mesa-noglu-18.1.7-drivers
72M     /nix/store/8cj5ib60ak732yprp4cz13sp0ig0qsv9-llvm-6.0.1-lib
73M     /nix/store/z910rqvwsxrkz57fi9ckbrlfvshgd453-breeze-icons-5.49.0
74M     /nix/store/lkc9g7gqfqxbssmnb3gpxxbk10zd1ycj-linux-4.14.71
92M     /nix/store/gyx36j03n7dhwm27b7sqkdz0cdp4x8rh-system-path
122M    /nix/store/78yiqfgzz2b32pn391najl1k1jqch2hf-glibc-locales-2.27
125M    /nix/store/0id5ff5l5xaa7d1hfj8p3afs69il80rf-qt-4.8.7
130M    /nix/store/vv4r320p5yd1k01kld62q1lppjxcswhb-gcc-7.3.0
138M    /nix/store/p6mid5fjaj0jpr1h1ksndwr1l4hr0g4j-firefox-unwrapped-61.0.2
140M    /nix/store/67f8paqxk686v9nxf3qhzn0v5vf12wi1-nixos-18.09beta521.e4966591ef6

I think we should be able to get rid of dependencies on:

• gcc-7.3.0
• qt-4.8.7
• firefox
• llvm-6.0.1

[worldofpeace]

Um, why remove firefox? You just added it to the OVA.

[matthewbauer]

Well it's already in the ISO. This just makes things consistent. Eventually we should move to either Konqueror or Falkon, maybe?

[vcunat]

llvm.lib is probably unavoidable due to mesa drivers, at least for the graphical image.

[davidak]

@matthewbauer i'm not sure if anyone uses Konqueror, but it would be consistent since it's the default KDE web-browser. When we could remove it from the image to save some space, we could discuss to include Chromium (Chrome is the most popular browser with about 60% market share http://gs.statcounter.com/) or Firefox (it's popular by privacy activists i think).

[matthewbauer]

Two more possible optimizations:

• I am seeing two copies of Nixpkgs in the images:

142M    94k9ygl28nmfixlkbsnf37fdrzbz9gwp-nixos-19.03pre153635.9bfd864c592
142M    d9agl1376dd99wr3c8mi791nnrvm6l9i-nixos-19.03pre153635.9bfd864c592

We should only need one.

• Some headers are getting pulled in incorrectly like gtk-dev:

$ nix why-depends /run/current-system /nix/store/f6raam3phafpy23l3gak2mvk8gpvbky3-gtk+3-3.22.30-dev
/nix/store/wr9lf4v5p4rm8wjn56k5ab5jyykfnqwl-nixos-system-nixos-19.03pre153635.9bfd864c592
╚═══activate: …/kcheckpass.echo -n "/nix/store/gdfndzkmz221lnhfkfa1z7c2mdr0yqc7-plasma-workspace-5.13.5-bin/lib…
    => /nix/store/gdfndzkmz221lnhfkfa1z7c2mdr0yqc7-plasma-workspace-5.13.5-bin
    ╚═══nix-support/propagated-user-env-packages: …kr7-kholidays-5.50.0 /nix/store/daxbb8q8khn1n7x1z58i0ivwjyv2giav-qtgraphicaleffects-5.11.1 /nix/…
        => /nix/store/daxbb8q8khn1n7x1z58i0ivwjyv2giav-qtgraphicaleffects-5.11.1
        ╚═══nix-support/propagated-build-inputs: …/nix/store/0xpd1a07sr37wjwbk28j70a23v3pn0r3-qtdeclarative-5.11.1-dev …
            => /nix/store/0xpd1a07sr37wjwbk28j70a23v3pn0r3-qtdeclarative-5.11.1-dev
            ╚═══nix-support/propagated-build-inputs: …/nix/store/rrrkknw8v4xq02wkc20brwdc2jrxm8hl-qtbase-5.11.1-dev /nix/store/2r…
                => /nix/store/rrrkknw8v4xq02wkc20brwdc2jrxm8hl-qtbase-5.11.1-dev
                ╚═══mkspecs/modules/qt_lib_widgets_private.pri: ….QMAKE_INCDIR_GTK3 = /nix/store/f6raam3phafpy23l3gak2mvk8gpvbky3-gtk+3-3.22.30-dev/include/>
                    => /nix/store/f6raam3phafpy23l3gak2mvk8gpvbky3-gtk+3-3.22.30-dev

[vcunat]

This chain would probably best get resolved by adding .dev for qtgraphicaleffects, but there may remain other references to gtk.dev and splits themselves aren't always problem-free...

[matthewbauer]

It might be the only qt framework without a dev output though. The default for qt modules is "dev" and "out". Not sure if avoiding it for qtgraphicaleffects was intentional though? (qtdoc is also out-only)

/cc @ttuegel

[ttuegel]

I think qtgraphicaleffects has one output to avoid circular dependencies. It could probably still be split, but I never tried.

[coretemp]

Falkon seems too new to include and Konqueror seems too broken to include (I don't know anyone who uses Konqueror on a daily basis).

[stale[bot]]

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