Installing openshot-qt on 21.05 as well as unstable produces a mismatch between libopenshot and openshot-qt versions which makes the program unusable:
(It just quits if you hit OK). This is on unstable, on 21.05 I believe it’s the same but the missing library version is 0.2.6 instead.
How do I fix this? I have an assignment due soon that requires video editing and I don’t have time to learn another program.
My system uses nixos-21.05 as the main channel and when I tried using openshot-qt I couldn’t see an issue. I installed it with nix-shell -p openshot-qt and inside that shell, started it with openshot-qt.
If you need to fix this quickly, try using the flaptak temporarily: Flathub—An app store and build service for Linux
Or a VM, gnome.gnome-boxes and installing Ubuntu with it is the most foolproof way to just make some software work quickly. As a word of warning, you may need to enable virtualisation.libvirtd.package and flick the virtualization support switch in your BIOS for this.
To fix the actual issue, some idea of how your software is installed, and probably a look at your nixos configuration (and possibly home manager configuration) would be helpful - considering what @ilkecan says you probably have something odd going on, perhaps a mix of stable/unstable 
thanks! i may have found a way to not need it so urgently, but i’d still like to get it working natively without flatpak or virtualization (i don’t like flatpak + this is an old macbook and i’m not sure virtualization will be fast enough to be usable anyway given the hardware’s age). here’s my configuration.nix:
{ config, pkgs, ... }:
{
imports =
[
./hardware-configuration.nix
];
nixpkgs.config.allowUnfree = true;
# This value determines the NixOS release from which the default
# settings for stateful data, like file locations and database versions
# on your system were taken. It‘s perfectly fine and recommended to leave
# this value at the release version of the first install of this system.
# Before changing this value read the documentation for this option
# (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
system.stateVersion = "21.11"; # Did you read the comment?
# Localization
time.timeZone = "America/Denver";
i18n.defaultLocale = "en_US.UTF-8";
# Networking
networking.networkmanager.enable = true;
networking.hostName = "lyndsay-macbook";
networking.useDHCP = false;
networking.interfaces.wlp3s0.useDHCP = true;
networking.enableB43Firmware = true;
# Desktop environment
services.xserver.enable = true;
services.xserver.layout = "us";
services.xserver.displayManager.sddm.enable = true;
services.xserver.desktopManager.plasma5.enable = true;
# CUPS printing
services.printing.enable = true;
services.printing.drivers = [ pkgs.hplip ];
# Sound - via PipeWire
hardware.bluetooth.enable = true;
security.rtkit.enable = true;
services.pipewire = {
enable = true;
alsa.enable = true;
alsa.support32Bit = true;
pulse.enable = true;
jack.enable = true;
media-session.config.bluez-monitor.rules = [
{
# Matches all cards
matches = [ { "device.name" = "~bluez_card.*"; } ];
actions = {
"update-props" = {
"bluez5.reconnect-profiles" = [ "hfp_hf" "hsp_hs" "a2dp_sink" ];
# mSBC is not expected to work on all headset + adapter combinations.
"bluez5.msbc-support" = true;
# SBC-XQ is not expected to work on all headset + adapter combinations.
"bluez5.sbc-xq-support" = true;
};
};
}
{
matches = [
# Matches all sources
{ "node.name" = "~bluez_input.*"; }
# Matches all outputs
{ "node.name" = "~bluez_output.*"; }
];
actions = {
"node.pause-on-idle" = false;
};
}
];
};
boot.initrd.supportedFilesystems = [ "btrfs" ];
boot.kernelParams = [ "nohibernate" ];
boot.loader.efi.canTouchEfiVariables = true;
boot.loader.grub.copyKernels = true;
boot.loader.grub.efiSupport = true;
boot.loader.grub.theme = "/boot/grub/themes/nix";
boot.loader.grub.useOSProber = true;
boot.loader.grub.enable = true;
boot.loader.grub.device = "nodev";
boot.plymouth.enable = true;
boot.supportedFilesystems = [ "btrfs" ];
systemd.extraConfig = ''
DefaultTimeoutStopSec=5s
DefaultTimeoutStartSec=5s
'';
users.users.lyndsay = {
isNormalUser = true;
extraGroups = [ "networkmanager" "wheel" ];
home = "/usr/lyndsay";
uid = 1000;
};
# software
programs.steam.enable = true;
nixpkgs.config.vivaldi = { proprietaryCodecs = true; enableWideVine = true; };
nixpkgs.config.permittedInsecurePackages = [
"ffmpeg-3.4.8"
];
environment.systemPackages = with pkgs; [
ark
audacity
blender
citra
cmake
discord
desmume
dolphinEmu
fontforge
gcc
gdb
gnome.ghex
gimp
git
gparted
gwenview
inkscape
k3b
kate
kcalc
keepassxc
kdeconnect
latte-dock
libreoffice-qt
libsForQt5.applet-window-buttons
libsForQt5.qtquickcontrols
libsForQt5.qtstyleplugin-kvantum
lmms
musescore
# natron
neofetch
okular
openshot-qt
pavucontrol
pciutils
rstudio
spotify
texworks
thunderbird
usbutils
vivaldi-widevine
vivaldi-ffmpeg-codecs
vivaldi
vscode
wget
wineWowPackages.full
zoom
];
}
$ nix-channel --list
nixos https://nixos.org/channels/nixos-unstable
stable https://nixos.org/channels/nixos-21.05
unstable https://nixos.org/channels/nixos-unstable
i don’t have home manager and i’m not doing any nix-env crap, everything that’s installed is installed explicitly or implicitly from configuration.nix.
What about sudo nix-channel --list? Users and root have different channels, so the ones you list there aren’t used for your system configuration (and I believe they need to be updated separately, though I’ve long since moved to flakes and am not too sure anymore).
oh yeah duh that’s right.
$ su -c "nix-channel --list"
nixos https://nixos.org/channels/nixos-unstable
nixos-unstable https://nixos.org/channels/nixos-unstable
i don’t know why i aliased unstable as unstable on user and nixos-unstable on root but i don’t think that really matters here
Your configuration looks perfectly correct
I tried this too, using nix run github:nixos/nixpkgs/master#openshot-qt to make sure I get the very latest from upstream, it looks like the package is simply currently broken. You can probably just bump the version of libopenshot here: nixpkgs/libopenshot.nix at eb3926cf542cc35f69faddbaa102e817a08fed61 · NixOS/nixpkgs · GitHub.
If you still want a downstream fix, overriding the package is probably an option, but I think the best thing to do is just to write a patch to upstream. That, or join us over on stable land, but I’ve honestly found unstable to be more “stable” because far too many people use unstable and usually someone fixes these issues before they hit you.
thanks, i’ll look at that and see if i can submit a patch when i get a chance!