after "nix-shell", if roocode runs a command it opens a new shell, cancelling the nix-shell

[UriZafrir]

App Version

3.25.11

API Provider

Google Gemini

Model Used

gemini-2.5-flash

Roo Code Task Links (Optional)

No response

🔁 Steps to Reproduce

see video:

Screencast.From.2025-08-12.23-32-30.webm

run nix-shell for example with the be;pw shell.nix file:

tell roocode to run "ls"
it opens a new bash

let
  pkgs = import <nixpkgs> { };
in
pkgs.mkShell {
  nativeBuildInputs = with pkgs; [
    pkg-config
    gobject-introspection
    cargo
    cargo-tauri
    nodejs
  ];

  buildInputs = with pkgs;[
    at-spi2-atk
    atkmm
    cairo
    gdk-pixbuf
    glib
    gtk3
    harfbuzz
    librsvg
    libsoup_3
    pango
    webkitgtk_4_1
    openssl
  ];
}

after running "env" before and after "nix-shell" these are the difference according to AI:

Comparison of Scenario 1 (Base) vs. Scenario 2 (nix-shell original):

New variables in nix-shell (Scenario 2 only):

NIX_BUILD_CORES
configureFlags
mesonFlags
PKG_CONFIG_PATH (extensively modified with Nix store paths)
shell (points to /nix/store/.../bash-5.2p37/bin/bash)
depsHostHost
stdenv
builder
GDK_PIXBUF_MODULE_FILE
shellHook (empty, but present)
phases
SOURCE_DATE_EPOCH
NIX_ENFORCE_NO_NATIVE
CXX
TEMPDIR
system
HOST_PATH (extensively modified with Nix store paths)
IN_NIX_SHELL (value impure)
doInstallCheck
LD
READELF
buildPhase (multi-line string)
GETTEXTDATADIRS_FOR_BUILD
doCheck
depsBuildBuild
AR
AS
TEMP
NIX_BINTOOLS_WRAPPER_TARGET_HOST_x86_64_unknown_linux_gnu
NIX_BUILD_TOP
NM
NIX_CFLAGS_COMPILE (extensively modified with Nix store paths)
propagatedNativeBuildInputs
strictDeps
outputs
cmakeFlags
NIX_STORE
TMPDIR (duplicate of TEMP)
NIX_PKG_CONFIG_WRAPPER_TARGET_HOST_x86_64_unknown_linux_gnu
NODE_PATH
depsBuildTarget
OBJCOPY
out
STRIP
propagatedBuildInputs (extensively modified with Nix store paths)
CC
NIX_CC
NIX_CC_WRAPPER_TARGET_HOST_x86_64_unknown_linux_gnu
CONFIG_SHELL
__structuredAttrs
RANLIB
NIX_HARDENING_ENABLE
NIX_LDFLAGS (extensively modified with Nix store paths)
nativeBuildInputs
name
PKG_CONFIG
depsHostHostPropagated
Modified variables in nix-shell (Scenario 2 vs. Scenario 1):

SHELL: Changed from /run/current-system/sw/bin/bash to /nix/store/.../bash-interactive-5.2p37/bin/bash.
PATH: Significantly expanded with many Nix store paths.
SHLVL: Increased from 2 to 3.
GI_TYPELIB_PATH: Significantly expanded with many Nix store paths.
XDG_DATA_DIRS: Significantly expanded with many Nix store paths.
LIBEXEC_PATH: Significantly expanded with many Nix store paths.
NIX_PROFILES: Expanded.
INFOPATH: Expanded.
GTK_PATH: Expanded.
QTWEBKIT_PLUGIN_PATH: Expanded.
GIO_EXTRA_MODULES: Expanded.
LD_LIBRARY_PATH: Expanded.
GSETTINGS_SCHEMAS_PATH: Expanded.
Variables that remained the same (or mostly the same, excluding path expansions):

PWD (confirmed correct)
TERM (confirmed xterm-256color)
PROMPT_EOL_MARK (still empty)
All VSCODE_ prefixed variables.
Many other standard environment variables.

💥 Outcome Summary

expected not to create new shell

📄 Relevant Logs or Errors (Optional)

[daniel-lxs]

Hey @UriZafrir, This seems to be the intended behavior. Roo Code will detect that the terminal is being used and create a new one to avoid killing the process.

Let me know if you have any questions!

[UriZafrir]

Why isn't this a problem?
i want roo to run commands in the nix shell.
for example - shell.nix contains all the dev dependencies, I run "nix shell", then i want roo to run commands in the dev shell for development, but can't.

also, if this is intended, how should i use "nix shell" or "nix develop" with roocode being able to run commands?