```
error: "/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/Cargo.lock" does not exist, unable to build with the standard library, try:
        rustup component add rust-src --toolchain nightly-x86_64-unknown-linux-gnu
```

https://github.com/bitcoin-core/HWI/actions/runs/16440824447/job/46462763374?pr=795

We can now use the main esp-idf toochain to install the appropriate
version of the qemu emulator, rather than building it ourselves from
source.  Mirrors change recently made to Jade repo.

LedgerHQ/speculos#565

See e.g. https://github.com/bitcoin-core/HWI/actions/runs/16440824447/job/46463441252

```
work/bitcoin/build/bin/bitcoind: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.38' not found (required by work/bitcoin/build/bin/bitcoind)
````

Job lingered for 45 minutes.

Seems to be no longer needed: Coldcard/firmware#537

Related CI failure:
https://github.com/bitcoin-core/HWI/actions/runs/16464204169/job/46537622260?pr=797

Manually re-applied the patch after the original code seems to have
moved around a bit.

Coldcard/firmware#173

```
ERROR: coldcard: test_signtx (test_device.TestSignTx.test_signtx) (addrtypes=['legacy'], multisig_types=['legacy'], external=True, op_return=False)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/__w/HWI/HWI/test/test_device.py", line 588, in test_signtx
    self._test_signtx(addrtypes, multisig_types, external, op_return)
  File "/__w/HWI/HWI/test/test_device.py", line 576, in _test_signtx
    self._generate_and_finalize(True, psbt)
  File "/__w/HWI/HWI/test/test_device.py", line 403, in _generate_and_finalize
    self.assertTrue(first_sign_res["signed"])
                    ~~~~~~~~~~~~~~^^^^^^^^^^
KeyError: 'signed'
```

LedgerHQ/speculos@a1b4918

LedgerHQ/speculos#593

This reverts commit edab2af.

The always() option is too powerfull. The next commit implements
an alternative solution to the original issue.

This ensures the failure to build a simulator for one device
doesn't abort running jobs for the others. They're still grouped
by manufacturer.

Alternative to bitcoin-core#743.

Build failure on ubuntu-latest:

```
../py/stackctrl.c: In function ‘mp_stack_ctrl_init’:
../py/stackctrl.c:32:32: error: storing the address of local variable ‘stack_dummy’ in ‘mp_state_ctx.thread.stack_top’ [-Werror=dangling-pointer=]
   32 |     MP_STATE_THREAD(stack_top) = (char *)&stack_dummy;
../py/stackctrl.c:31:18: note: ‘stack_dummy’ declared here
   31 |     volatile int stack_dummy;
      |                  ^~~~~~~~~~~
In file included from ../py/runtime.h:29,
                 from ../py/stackctrl.c:27:
../py/mpstate.h:282:23: note: ‘mp_state_ctx’ declared here
  282 | extern mp_state_ctx_t mp_state_ctx;
      |                       ^~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [../py/mkrules.mk:77: build/py/stackctrl.o] Error 1
```

Test failure (after downgrading build sim):

```
 File "/github/home/.cache/pypoetry/virtualenvs/hwi-crEDFiR--py3.9/lib/python3.9/site-packages/sdl2/dll.py", line 362, in <module>
    dll = DLL("SDL2", ["SDL2", "SDL2-2.0", "SDL2-2.0.0"], os.getenv("PYSDL2_DLL_PATH"))
  File "/github/home/.cache/pypoetry/virtualenvs/hwi-crEDFiR--py3.9/lib/python3.9/site-packages/sdl2/dll.py", line 253, in __init__
    raise RuntimeError("could not find any library for %s (%s)" %
RuntimeError: could not find any library for SDL2 (PYSDL2_DLL_PATH: unset)
```

https://github.com/bitcoin-core/HWI/actions/runs/16466809973/job/46548656293?pr=795

The build on ubuntu-latest succeeds, but the resulting binary uses
a too recent version of glibc for the test runners to handle.

This only seems to impact Trezor 1, but just downgrade for Trezor T
as well.

NanoS support has been dropped: LedgerHQ/app-bitcoin-new#262

NanoX also makes it possible to test MuSig2 in the future.

Keep NanoS for legacy.