rstudioWrapper not exporting environment variables in nix-shell

[afrubin]

Issue description

rstudio won't open correctly when built using nix-shell as part of pkgs.rstudioWrapper.override on the master branch.

Starting rstudio returns the following error:

$ rstudio
qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Aborted

However, when the same .nix file is passed to nix-build, the application starts as expected.

It appears that when built with nix-shell, the environment variables are not being set correctly:

$ cat $(which rstudio)
#! /nix/store/vs6d2fjkl4kb3jb7rwibsd76k9v2n4xy-bash-4.4-p23/bin/bash -e
export PATH=$PATH${PATH:+':'}'/nix/store/nj0aq4p4m55ci500x1flh8v2cc6snwh7-gnumake-4.2.1/bin'
exec -a "$0" "/nix/store/j5jvvi3sbpydji910xkb0xwyby078kwx-RStudio-1.1.463/bin/.rstudio-wrapped"  "${extraFlagsArray[@]}" "$@"

But they are being set correctly when built with nix-build:

$ cat result/bin/rstudio 
#! /nix/store/vs6d2fjkl4kb3jb7rwibsd76k9v2n4xy-bash-4.4-p23/bin/bash -e
export R_PROFILE_USER='/nix/store/slidksdja1p10im345m3mbkj8dsc54cb-RStudio-1.1.463-wrapper/fix_libs.R'
export QT_PLUGIN_PATH='/nix/store/kq10gqm6fx1r8k5402bkabc094n92flg-qtbase-5.12.0-bin/lib/qt-5.12/plugins'${QT_PLUGIN_PATH:+':'}$QT_PLUGIN_PATH
exec "/nix/store/j5jvvi3sbpydji910xkb0xwyby078kwx-RStudio-1.1.463/bin/rstudio"  "${extraFlagsArray[@]}" "$@"

According to the Nixpkgs documentation, using nix-shell with the rstudioWrapper should work correctly.

Using the stable version of Nixpkgs, both nix-shell and nix-build allow RStudio to start correctly.

Steps to reproduce

Use the example shell.nix from the Nixpkgs RStudio documentation with nix-shell on the master branch of Nixpkgs:

$ cat shell.nix 
{ pkgs ? import ../nixpkgs {}
}:

pkgs.rstudioWrapper.override {
  packages = with pkgs.rPackages; [ dplyr ggplot2 reshape2 ];
}

Technical details

• system: "x86_64-linux"
• host os: Linux 4.14.94, NixOS, 18.09.1972.5d9024da9b9 (Jellyfish)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.1.3
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

[knedlsepp]

Could probably be fixed via: #54525

[stale]

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[jbedo]

Resolved by #74381.