I have the VM building under nix from the master branch now. The build is based loosely on the linux.64x64 mvm script so it's building a 64-bit x86-64 VM. The pharo-vm commit I am testing is 1c38b03f (from wednesday.)

I have tried opening both Pharo-60465.image and Pharo-50771.image and both give this error:

This interpreter (vers. 68021) cannot read image file (vers. 6521).

How come? Is this because I built a 64-bit VM? If I want to use those images then should I build a 32-bit image instead? (Or none of the above?)

Then I found Pharo64-60465.image and this does open and display a window but it's frozen and prints these messages:

pthread_setschedparam failed: Operation not permitted
This VM uses a separate heartbeat thread to update its internal clock
and handle events.�� For best operation, this thread should run at a
higher priority, however the VM was unable to change the priority.�� The
effect is that heavily loaded systems may experience some latency
issues.�� If this occurs, please create the appropriate configuration
file in /etc/security/limits.d/ as shown below:

cat <<END | sudo tee /etc/security/limits.d/squeak.conf
* �� hard �� rtprio ��2
* �� soft �� rtprio ��2
END

and report to the squeak mailing list whether this improves behaviour.

You will need to log out and log back in for the limits to take effect.
For more information please see
https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/tag/r3732#linux
'Your VM is too old for this image. Please download the latest VM.'
Error: Can't find the requested origin ��
UnixResolver(PlatformResolver)>>cantFindOriginError
[ self cantFindOriginError ] in UnixResolver(PlatformResolver)>>directoryFromEnvVariableNamed: in Block: [ self cantFindOriginError ]
[ ^ aBlock value ] in UnixResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or: in Block: [ ^ aBlock value ]
BlockClosure>>cull:
Context>>evaluateSignal:
Context>>handleSignal:
Error(Exception)>>signal
Error(Exception)>>signal:
ExternalLibraryFunction(Object)>>error:
ExternalLibraryFunction(Object)>>externalCallFailed
ExternalLibraryFunction(ExternalFunction)>>invokeWithArguments:
UnixEnvironment(OSEnvironment)>>getEnv:
UnixEnvironment(OSEnvironment)>>at:ifAbsent:
[ Smalltalk os environment at: aString ifAbsent: [ nil ] ] in UnixResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or: in Block: [ Smalltalk os environment at: aString ifAbse\
nt: [...etc...
BlockClosure>>on:do:
UnixResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or:
UnixResolver(PlatformResolver)>>directoryFromEnvVariableNamed:
UnixResolver>>home
[ self home / '.config' ] in UnixResolver>>preferences in Block: [ self home / '.config' ]
[ ^ aBlock value ] in UnixResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or: in Block: [ ^ aBlock value ]
BlockClosure>>cull:
Context>>evaluateSignal:
Context>>handleSignal:
Error(Exception)>>signal
Error(Exception)>>signal:
ExternalLibraryFunction(Object)>>error:
ExternalLibraryFunction(Object)>>externalCallFailed
ExternalLibraryFunction(ExternalFunction)>>invokeWithArguments:
UnixEnvironment(OSEnvironment)>>getEnv:
FFICalloutAPI>>function:module:

Googling around it sounds like this "origin error" is caused by not finding the Sources file but I have provided the PharoV50.sources and strace suggests that it is opened okay:

open("/nix/store/w85ynpp3zm33k8h1hvzh2g7hf7ggwx1k-pharo-share-1.0/lib/PharoV50.sources", O_RDONLY) = 3
open("/nix/store/w85ynpp3zm33k8h1hvzh2g7hf7ggwx1k-pharo-share-1.0/lib/PharoV50.sources", O_RDONLY) = 6

So maybe the problem is that I need a different source file? Or maybe that I should switch to a 32-bit VM? Or something else entirely...?

Any help appreciated :)

-Luke