# Can't install mopidy-local with Mopidy 4.0 on RaspberryPi

**URL:** <https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327>\
**Category:** Help and support\
**Created:** [September 6, 2026, 1:51am UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327 "2026-09-06T01:51:48Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![tschofen](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/tschofen/32/2158_2.png) [@tschofen](https://discourse.mopidy.com/u/tschofen)\
**Post date:** [September 6, 2026, 1:51am UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/1 "2026-09-06T01:51:48Z")

</div>

Fresh install of latest Raspberry OS with disk imager. Did apt update/upgrade. Connected USB disk and USB Audio device.

Installed Mopidy 4.0.2 based on Debian instructions.

Tried to install mopidy-local and get an error:

> Installing collected packages: typing-extensions, h11, docstring-parser, annotated-types, typing-inspection, pydantic-core, httpcore, anyio, rich-rst, pydantic, httpx, cyclopts, mopidy, mopidy-local
> 
> Attempting uninstall: typing-extensions
> 
> ```
> Found existing installation: typing_extensions 4.13.2
> 
> ```
> 
> **error** : **uninstall-no-record-file**
> 
> × Cannot uninstall typing\_extensions 4.13.2
> 
> ╰─\> The package’s contents are unknown: no RECORD file was found for typing\_extensions.
> 
> **hint** : The package was installed by debian. You should check if it can uninstall the package.

I tried to run the command with ` **`--ignore-installed`** but that resulted in a different error:

> Installing build dependencies … error
> 
> **error** : **subprocess-exited-with-error**
> 
> × pip subprocess to install build dependencies did not run successfully.
> 
> │ exit code: **1**
> 
> ╰─\> [76 lines of output]
> 
> ```
> Looking in indexes: https://pypi.org/simple , https://www.piwheels.org/simple , https://www.piwheels.org/simple
> 
> Collecting meson-python>=0.12.1
> 
> Using cached https://www.piwheels.org/simple/meson-python/meson_python-0.20.0-py3-none-any.whl.metadata (2.1 kB)
> 
> Collecting pycairo>=1.16
> 
> Using cached pycairo-1.29.1.tar.gz (666 kB)
> 
> Installing build dependencies: started
> 
> Installing build dependencies: finished with status 'done'
> 
> Getting requirements to build wheel: started
> 
> Getting requirements to build wheel: finished with status 'done'
> 
> Installing backend dependencies: started
> 
> Installing backend dependencies: finished with status 'done'
> 
> Preparing metadata (pyproject.toml): started
> 
> Preparing metadata (pyproject.toml): finished with status 'error'
> 
> error: subprocess-exited-with-error
> 
> × Preparing metadata (pyproject.toml) did not run successfully.
> 
> │ exit code: 1
> 
> ╰─> \[48 lines of output\]
> 
> + meson setup /tmp/pip-install-siq0iev2/pycairo_567e7299d4f54403a99176ca7b282da6 /tmp/pip-install-siq0iev2/pycairo_567e7299d4f54403a99176ca7b282da6/.mesonpy-imon8tt4 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md -Dwheel=true -Dtests=false --native-file=/tmp/pip-install-siq0iev2/pycairo_567e7299d4f54403a99176ca7b282da6/.mesonpy-imon8tt4/meson-python-native-file.ini
> 
> The Meson build system
> 
> Version: 1.12.0
> 
> Source dir: /tmp/pip-install-siq0iev2/pycairo_567e7299d4f54403a99176ca7b282da6
> 
> Build dir: /tmp/pip-install-siq0iev2/pycairo_567e7299d4f54403a99176ca7b282da6/.mesonpy-imon8tt4
> 
> Build type: native build
> 
> Project name: pycairo
> 
> Project version: 1.29.1
> 
> C compiler for the host machine: cc (gcc 14.2.0 "cc (Debian 14.2.0-19) 14.2.0")
> 
> C linker for the host machine: cc ld.bfd 2.44
> 
> Host machine cpu family: aarch64
> 
> Host machine cpu: aarch64
> 
> Program python3 found: YES (/usr/bin/python3)
> 
> Compiler for C supports arguments -Wall: YES
> 
> Compiler for C supports arguments -Warray-bounds: YES
> 
> Compiler for C supports arguments -Wcast-align: YES
> 
> Compiler for C supports arguments -Wconversion: YES
> 
> Compiler for C supports arguments -Wextra: YES
> 
> Compiler for C supports arguments -Wformat=2: YES
> 
> Compiler for C supports arguments -Wformat-nonliteral: YES
> 
> Compiler for C supports arguments -Wformat-security: YES
> 
> Compiler for C supports arguments -Wimplicit-function-declaration: YES
> 
> Compiler for C supports arguments -Winit-self: YES
> 
> Compiler for C supports arguments -Wmissing-format-attribute: YES
> 
> Compiler for C supports arguments -Wmissing-noreturn: YES
> 
> Compiler for C supports arguments -Wnested-externs: YES
> 
> Compiler for C supports arguments -Wold-style-definition: YES
> 
> Compiler for C supports arguments -Wpacked: YES
> 
> Compiler for C supports arguments -Wpointer-arith: YES
> 
> Compiler for C supports arguments -Wreturn-type: YES
> 
> Compiler for C supports arguments -Wshadow: YES
> 
> Compiler for C supports arguments -Wsign-compare: YES
> 
> Compiler for C supports arguments -Wstrict-aliasing: YES
> 
> Compiler for C supports arguments -Wundef: YES
> 
> Compiler for C supports arguments -Wunused-but-set-variable: YES
> 
> Compiler for C supports arguments -Wswitch-default: YES
> 
> Compiler for C supports arguments -Wno-missing-field-initializers: YES
> 
> Compiler for C supports arguments -Wno-unused-parameter: YES
> 
> Compiler for C supports arguments -fno-strict-aliasing: YES
> 
> Compiler for C supports arguments -fvisibility=hidden: YES
> 
> Found pkg-config: YES (/usr/bin/pkg-config) 1.8.1
> 
> Did not find CMake 'cmake'
> 
> Found CMake: NO
> 
> Run-time dependency cairo found: NO (tried pkg-config)
> 
> ../cairo/meson.build:31:12: ERROR: Dependency "cairo" not found (tried pkg-config)
> 
> A full log can be found at /tmp/pip-install-siq0iev2/pycairo_567e7299d4f54403a99176ca7b282da6/.mesonpy-imon8tt4/meson-logs/meson-log.txt
> 
> \[end of output\]
> 
> note: This error originates from a subprocess, and is likely not a problem with pip.
> 
> error: metadata-generation-failed
> 
> × Encountered error while generating package metadata.
> 
> ╰─> See above for output.
> 
> note: This is an issue with the package mentioned above, not pip.
> 
> hint: See above for details.
> 
> \[end of output\]
> 
> ```
> 
> **note** : This error originates from a subprocess, and is likely not a problem with pip.

Any idea how I can fix this issue?

Running: Raspberry Pi 4 Model B Rev 1.2 with 4GB.

---

<div class="post-metadata">

**Author:** ![Matthias\_Meulien](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/matthias_meulien/32/2260_2.png) [@Matthias\_Meulien](https://discourse.mopidy.com/u/Matthias_Meulien)\
**Post date:** [September 6, 2026, 2:48am UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/2 "2026-09-06T02:48:42Z")

</div>

@tschofen Are you referring to the Debian instructions at [Manual install - Mopidy](https://docs.mopidy.com/latest/installation/manual/#extensions)? What are you trying to do: A global install or an install in a virtual environment? It’s difficult to guess from the command output only…

Whatever, the shared output says that `cmake` and `cairo` are not found in the environment.

Did you forget to install the required dependencies as shown in the above documentation?

```auto
$ sudo apt install \
    gir1.2-gst-plugins-base-1.0 \
    gir1.2-gstreamer-1.0 \
    gstreamer1.0-plugins-good \
    gstreamer1.0-plugins-ugly \
    gstreamer1.0-tools \
    libcairo2-dev \
    libgirepository-2.0-dev \
    python3-gst-1.0

```

As you can check (eg `apt-cache depends --recurse libcairo2-dev | grep -c cmake`), `cmake` and `cairo` are dependencies and will be present on your system (which version of the OS?) after those dependencies are installed.

---

<div class="post-metadata">

**Author:** ![tschofen](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/tschofen/32/2158_2.png) [@tschofen](https://discourse.mopidy.com/u/tschofen)\
**Post date:** [September 6, 2026, 2:21pm UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/3 "2026-09-06T14:21:27Z")

</div>

I followed the Mopidy [system packages instructions](https://docs.mopidy.com/stable/installation/packages/) for Debian 13 Trixie. Mopidy itself installed without any errors. When I started installing extensions, I was able to install mopidy-iris, but mopidy-local is where the error happens. I haven’t installed anything else on this clean install.

`apt-cache depends --recurse libcairo2-dev | grep -c cmake` returns `68` . I did not install the dependencies you suggested so far. I was hoping the standard install should take care of all that.

`cat /etc/os-release` returns

> PRETTY\_NAME=“Debian GNU/Linux 13 (trixie)”
> 
> NAME=“Debian GNU/Linux”
> 
> VERSION\_ID=“13”
> 
> VERSION=“13 (trixie)”
> 
> VERSION\_CODENAME=trixie
> 
> DEBIAN\_VERSION\_FULL=13.6
> 
> ID=debian
> 
> HOME\_URL=“[https://www.debian.org/](https://www.debian.org/)”
> 
> SUPPORT\_URL=" [Debian -- User Support](https://www.debian.org/support) "
> 
> BUG\_REPORT\_URL=“[https://bugs.debian.org/](https://bugs.debian.org/)”

---

<div class="post-metadata">

**Author:** ![Matthias\_Meulien](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/matthias_meulien/32/2260_2.png) [@Matthias\_Meulien](https://discourse.mopidy.com/u/Matthias_Meulien)\
**Post date:** [September 6, 2026, 3:54pm UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/4 "2026-09-06T15:54:54Z")

</div>

> I followed the Mopidy [system packages instructions](https://docs.mopidy.com/stable/installation/packages/) for Debian 13 Trixie. Mopidy itself installed without any errors.

But Mopidy-Local 4.x requires Mopidy 4.x and the latter is not yet available as Debian package. Thus when you install Mopidy-Local 4.0.x using `pip` then it tries to install Mopidy 4.x which requires `pycairo` whose install fails due to lack of libraries and tooling on the host.

Look for the parents of `pycairo` in the dependency graph:

```auto
(env) matthias@peitho:~/Projets/mopidy-dev/mopidy-local $
⏵ pipdeptree -p mopidy-local
mopidy-local==4.0.1
┣━━ ✓ mopidy required: >=4.0.2 installed: 4.0.2
┃ ┣━━ ✓ cyclopts required: >=3.12 installed: 4.11.0
┃ ┃ ┣━━ ✓ attrs required: >=23.1.0 installed: 26.1.0
┃ ┃ ┣━━ ✓ docstring_parser required: >=0.15,<4.0 installed: 0.18.0
┃ ┃ ┣━━ ✓ rich required: >=13.6.0 installed: 15.0.0
┃ ┃ ┃ ┣━━ ✓ markdown-it-py required: >=2.2.0 installed: 4.0.0
┃ ┃ ┃ ┃ ┗━━ ✓ mdurl required: ~=0.1 installed: 0.1.2
┃ ┃ ┃ ┗━━ ✓ Pygments required: >=2.13.0,<3.0.0 installed: 2.20.0
┃ ┃ ┗━━ ✓ rich-rst required: >=1.3.1,<2.0.0 installed: 1.3.2
┃ ┃ ┣━━ ✓ docutils required: Any installed: 0.22.4
┃ ┃ ┗━━ ✓ rich required: >=12.0.0 installed: 15.0.0
┃ ┃ ┣━━ ✓ markdown-it-py required: >=2.2.0 installed: 4.0.0
┃ ┃ ┃ ┗━━ ✓ mdurl required: ~=0.1 installed: 0.1.2
┃ ┃ ┗━━ ✓ Pygments required: >=2.13.0,<3.0.0 installed: 2.20.0
┃ ┣━━ ✓ httpx required: >=0.28.1 installed: 0.28.1
┃ ┃ ┣━━ ✓ anyio required: Any installed: 4.13.0
┃ ┃ ┃ ┗━━ ✓ idna required: >=2.8 installed: 3.13
┃ ┃ ┣━━ ✓ certifi required: Any installed: 2026.4.22
┃ ┃ ┣━━ ✓ httpcore required: ==1.* installed: 1.0.9
┃ ┃ ┃ ┣━━ ✓ certifi required: Any installed: 2026.4.22
┃ ┃ ┃ ┗━━ ✓ h11 required: >=0.16 installed: 0.16.0
┃ ┃ ┗━━ ✓ idna required: Any installed: 3.13
┃ ┣━━ ✓ platformdirs required: >=4.3 installed: 4.9.6
┃ ┣━━ ✓ pydantic required: >=2.10 installed: 2.13.3
┃ ┃ ┣━━ ✓ annotated-types required: >=0.6.0 installed: 0.7.0
┃ ┃ ┣━━ ✓ pydantic_core required: ==2.46.3 installed: 2.46.3
┃ ┃ ┃ ┗━━ ✓ typing_extensions required: >=4.14.1 installed: 4.15.0
┃ ┃ ┣━━ ✓ typing_extensions required: >=4.14.1 installed: 4.15.0
┃ ┃ ┗━━ ✓ typing-inspection required: >=0.4.2 installed: 0.4.2
┃ ┃ ┗━━ ✓ typing_extensions required: >=4.12.0 installed: 4.15.0
┃ ┣━━ ✓ PyGObject required: >=3.50 installed: 3.56.2
┃ ┃ ┗━━ ✓ pycairo required: >=1.16 installed: 1.29.0
┃ ┣━━ ✓ pykka required: >=4.1 installed: 4.4.2
┃ ┣━━ ✓ rich required: >=13.9 installed: 15.0.0
┃ ┃ ┣━━ ✓ markdown-it-py required: >=2.2.0 installed: 4.0.0
┃ ┃ ┃ ┗━━ ✓ mdurl required: ~=0.1 installed: 0.1.2
┃ ┃ ┗━━ ✓ Pygments required: >=2.13.0,<3.0.0 installed: 2.20.0
┃ ┗━━ ✓ tornado required: >=6.4.2 installed: 6.5.5
┣━━ ✓ pykka required: >=4.1 installed: 4.4.2
┗━━ ✓ uritools required: >=4.0.3 installed: 6.0.2

```

Install the dependencies. Remove the Mopidy DEB packages. Then installing both Mopidy 4.x and Mopidy-Local 4.x in a virtual environment should work.

---

<div class="post-metadata">

**Author:** ![tschofen](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/tschofen/32/2158_2.png) [@tschofen](https://discourse.mopidy.com/u/tschofen)\
**Post date:** [September 6, 2026, 5:36pm UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/5 "2026-09-06T17:36:53Z")

</div>

Looks like I’m too early in installing Mopidy 4 as mopidy-iris isn’t compatible with it yet. What other web front ends are ready for Mopidy 4?

Version info:

> Name: mopidy
> 
> Version: 4.0.2
> 
> Summary: Mopidy is an extensible music server written in Python
> 
> Home-page: [https://mopidy.com/](https://mopidy.com/)
> 
> Author:
> 
> Author-email: Stein Magnus Jodal [stein.magnus@jodal.no](mailto:stein.magnus@jodal.no)
> 
> License: Apache-2.0
> 
> Location: /opt/mopidy/venv/lib/python3.13/site-packages
> 
> Requires: cyclopts, httpx, platformdirs, pydantic, pygobject, pykka, rich, tornado
> 
> Required-by: Mopidy-Iris, mopidy-local
> 
> -–
> 
> Name: Mopidy-Iris
> 
> Version: 3.70.0
> 
> Summary: Fully-featured Mopidy frontend client
> 
> Home-page: [GitHub - jaedb/Iris: Discover, explore and manage your music library across multiple sources with this beautiful web-based interface. Iris is a Mopidy frontend extension. · GitHub](https://github.com/jaedb/iris)
> 
> Author: James Barnsley
> 
> Author-email: james@barnsley.nz
> 
> License: Apache License, Version 2.0
> 
> Location: /opt/mopidy/venv/lib/python3.13/site-packages
> 
> Requires: Mopidy, Pykka, setuptools
> 
> Required-by:

Log info: sudo journalctl -u mopidy -b --no-pager

> Sep 06 12:23:09 rpi systemd[1]: Started mopidy.service - Mopidy music server.
> 
> Sep 06 12:23:10 rpi mopidy[7252]: TU: error: ../src/freedreno/vulkan/tu\_knl.cc:395: failed to open device /dev/dri/renderD128 (VK\_ERROR\_INCOMPATIBLE\_DRIVER)
> 
> Sep 06 12:23:10 rpi mopidy[7252]: MESA: error: Opening /dev/dri/card1 failed: Permission denied
> 
> Sep 06 12:23:10 rpi mopidy[7252]: MESA: error: Opening /dev/dri/card0 failed: Permission denied
> 
> Sep 06 12:23:10 rpi mopidy[7252]: MESA: error: Opening /dev/dri/renderD128 failed: Permission denied
> 
> Sep 06 12:23:12 rpi mopidy[7249]: 12:23:12 WARNING MainThread mopidy.\_app.extensions
> 
> Sep 06 12:23:12 rpi mopidy[7249]: Extensions with config errors: m3u
> 
> Sep 06 12:23:12 rpi mopidy[7249]: WARNING MainThread mopidy.\_app.config
> 
> Sep 06 12:23:12 rpi mopidy[7249]: Found ‘m3u’ configuration errors. The extension has been
> 
> Sep 06 12:23:12 rpi mopidy[7249]: automatically disabled:
> 
> Sep 06 12:23:12 rpi mopidy[7249]: WARNING MainThread mopidy.\_app.config
> 
> Sep 06 12:23:12 rpi mopidy[7249]: m3u/base\_dir: Unexpanded ‘$…’ in path ‘$XDG\_MUSIC\_DIR’
> 
> Sep 06 12:23:12 rpi mopidy[7249]: WARNING MainThread mopidy.\_app.config
> 
> Sep 06 12:23:12 rpi mopidy[7249]: m3u/enabled: Extension stopped due to config errors
> 
> Sep 06 12:23:12 rpi mopidy[7249]: ERROR MainThread mopidy.\_app.server
> 
> Sep 06 12:23:12 rpi mopidy[7249]: Extension iris failed during setup. This might have left the
> 
> Sep 06 12:23:12 rpi mopidy[7249]: registry in a bad state.
> 
> Sep 06 12:23:12 rpi mopidy[7249]: Traceback (most recent call last):
> 
> Sep 06 12:23:12 rpi mopidy[7249]: File
> 
> Sep 06 12:23:12 rpi mopidy[7249]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy/\_app/ser
> 
> Sep 06 12:23:12 rpi mopidy[7249]: ver.py", line 37, in command
> 
> Sep 06 12:23:12 rpi mopidy[7249]: record.extension.setup(registry)
> 
> Sep 06 12:23:12 rpi mopidy[7249]: ~~~~~~~~~~~~~~~~~~~~~~ ^^^^^^^^^^
> 
> Sep 06 12:23:12 rpi mopidy[7249]: File
> 
> Sep 06 12:23:12 rpi mopidy[7249]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/\_\_i
> 
> Sep 06 12:23:12 rpi mopidy[7249]: nit\_\_.py", line 43, in setup
> 
> Sep 06 12:23:12 rpi mopidy[7249]: from .frontend import IrisFrontend
> 
> Sep 06 12:23:12 rpi mopidy[7249]: File
> 
> Sep 06 12:23:12 rpi mopidy[7249]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/fro
> 
> Sep 06 12:23:12 rpi mopidy[7249]: ntend.py", line 5, in
> 
> Sep 06 12:23:12 rpi mopidy[7249]: from .mem import iris
> 
> Sep 06 12:23:12 rpi mopidy[7249]: File
> 
> Sep 06 12:23:12 rpi mopidy[7249]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/mem
> 
> Sep 06 12:23:12 rpi mopidy[7249]: .py", line 1, in
> 
> Sep 06 12:23:12 rpi mopidy[7249]: from .core import IrisCore
> 
> Sep 06 12:23:12 rpi mopidy[7249]: File
> 
> Sep 06 12:23:12 rpi mopidy[7249]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/cor
> 
> Sep 06 12:23:12 rpi mopidy[7249]: e.py", line 13, in
> 
> Sep 06 12:23:12 rpi mopidy[7249]: from pkg\_resources import parse\_version
> 
> Sep 06 12:23:12 rpi mopidy[7249]: ModuleNotFoundError: No module named ‘pkg\_resources’
> 
> Sep 06 12:30:22 rpi systemd[1]: Stopping mopidy.service - Mopidy music server…
> 
> Sep 06 12:30:23 rpi systemd[1]: mopidy.service: Deactivated successfully.
> 
> Sep 06 12:30:23 rpi systemd[1]: Stopped mopidy.service - Mopidy music server.
> 
> Sep 06 12:30:23 rpi systemd[1]: mopidy.service: Consumed 3.685s CPU time.
> 
> Sep 06 12:30:23 rpi systemd[1]: Started mopidy.service - Mopidy music server.
> 
> Sep 06 12:30:24 rpi mopidy[7310]: 12:30:24 WARNING MainThread mopidy.\_app.extensions
> 
> Sep 06 12:30:24 rpi mopidy[7310]: Extensions with config errors: m3u
> 
> Sep 06 12:30:24 rpi mopidy[7310]: WARNING MainThread mopidy.\_app.config
> 
> Sep 06 12:30:24 rpi mopidy[7310]: Found ‘m3u’ configuration errors. The extension has been
> 
> Sep 06 12:30:24 rpi mopidy[7310]: automatically disabled:
> 
> Sep 06 12:30:24 rpi mopidy[7310]: WARNING MainThread mopidy.\_app.config
> 
> Sep 06 12:30:24 rpi mopidy[7310]: m3u/base\_dir: Unexpanded ‘$…’ in path ‘$XDG\_MUSIC\_DIR’
> 
> Sep 06 12:30:24 rpi mopidy[7310]: WARNING MainThread mopidy.\_app.config
> 
> Sep 06 12:30:24 rpi mopidy[7310]: m3u/enabled: Extension stopped due to config errors
> 
> Sep 06 12:30:24 rpi mopidy[7310]: ERROR MainThread mopidy.\_app.server
> 
> Sep 06 12:30:24 rpi mopidy[7310]: Extension iris failed during setup. This might have left the
> 
> Sep 06 12:30:24 rpi mopidy[7310]: registry in a bad state.
> 
> Sep 06 12:30:24 rpi mopidy[7310]: Traceback (most recent call last):
> 
> Sep 06 12:30:24 rpi mopidy[7310]: File
> 
> Sep 06 12:30:24 rpi mopidy[7310]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy/\_app/ser
> 
> Sep 06 12:30:24 rpi mopidy[7310]: ver.py", line 37, in command
> 
> Sep 06 12:30:24 rpi mopidy[7310]: record.extension.setup(registry)
> 
> Sep 06 12:30:24 rpi mopidy[7310]: ~~~~~~~~~~~~~~~~~~~~~~ ^^^^^^^^^^
> 
> Sep 06 12:30:24 rpi mopidy[7310]: File
> 
> Sep 06 12:30:24 rpi mopidy[7310]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/\_\_i
> 
> Sep 06 12:30:24 rpi mopidy[7310]: nit\_\_.py", line 43, in setup
> 
> Sep 06 12:30:24 rpi mopidy[7310]: from .frontend import IrisFrontend
> 
> Sep 06 12:30:24 rpi mopidy[7310]: File
> 
> Sep 06 12:30:24 rpi mopidy[7310]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/fro
> 
> Sep 06 12:30:24 rpi mopidy[7310]: ntend.py", line 5, in
> 
> Sep 06 12:30:24 rpi mopidy[7310]: from .mem import iris
> 
> Sep 06 12:30:24 rpi mopidy[7310]: File
> 
> Sep 06 12:30:24 rpi mopidy[7310]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/mem
> 
> Sep 06 12:30:24 rpi mopidy[7310]: .py", line 1, in
> 
> Sep 06 12:30:24 rpi mopidy[7310]: from .core import IrisCore
> 
> Sep 06 12:30:24 rpi mopidy[7310]: File
> 
> Sep 06 12:30:24 rpi mopidy[7310]: "/opt/mopidy/venv/lib/python3.13/site-packages/mopidy\_iris/cor
> 
> Sep 06 12:30:24 rpi mopidy[7310]: e.py", line 16, in
> 
> Sep 06 12:30:24 rpi mopidy[7310]: from mopidy.models.serialize import ModelJSONEncoder
> 
> Sep 06 12:30:24 rpi mopidy[7310]: ModuleNotFoundError: No module named ‘mopidy.models.serialize’

---

<div class="post-metadata">

**Author:** ![Matthias\_Meulien](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/matthias_meulien/32/2260_2.png) [@Matthias\_Meulien](https://discourse.mopidy.com/u/Matthias_Meulien)\
**Post date:** [September 6, 2026, 5:45pm UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/6 "2026-09-06T17:45:31Z")

</div>

According to [Provide (alpha) version compatible with Mopidy 4.0.0 alpha versions · Issue #999 · jaedb/Iris · GitHub](https://github.com/jaedb/Iris/issues/999) you’re right Iris doesn’t support Mopidy 4.

For the other frontend, well I feel uncomfortable since I myself found exactly what I was looking for with Argos (not a web frontend), but I’m not at all objective since I wrote it 🙂

---

<div class="post-metadata">

**Author:** ![tschofen](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/tschofen/32/2158_2.png) [@tschofen](https://discourse.mopidy.com/u/tschofen)\
**Post date:** [September 6, 2026, 6:01pm UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/7 "2026-09-06T18:01:22Z")

</div>

I’ll have to look for alternatives, or wait and see as I’m mostly accessing Mopidy from iOS and Mac.

Thank you for your help.

---

<div class="post-metadata">

**Author:** ![jodal](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/jodal/32/2564_2.png) [@jodal](https://discourse.mopidy.com/u/jodal)\
**Post date:** [September 15, 2026, 9:36am UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/8 "2026-09-15T09:36:34Z")

</div>

Good news: this got a lot easier in the last few days. The APT archive at [apt.mopidy.com](http://apt.mopidy.com) now has mopidy 4.0.4 and Debian packages for most extensions, including mopidy-local and mopidy-mpd.

---

<div class="post-metadata">

**Author:** ![tschofen](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.mopidy.com/tschofen/32/2158_2.png) [@tschofen](https://discourse.mopidy.com/u/tschofen)\
**Post date:** [September 15, 2026, 1:39pm UTC](https://discourse.mopidy.com/t/cant-install-mopidy-local-with-mopidy-4-0-on-raspberrypi/6327/9 "2026-09-15T13:39:13Z")

</div>

That’s great. Now I just need a web client that works with Mopidy 4 and mopidy-local.

Thank you making Mopidy happen.