Trying to add specific tags of github library does not work

Libraries
1

So I am trying to user a Timer Library from GitHub - JChristensen/Timer: A fork of Simon Monk's Arduino Timer library and more specifically tag version 2.1

I’ve inserted this in platfromio.ini file :

lib_deps =
  https://github.com/JChristensen/Timer @ 2.1

But PlatformIO complains that it cannot retrieve the specified version; I get this error message :

Resolving cyd2usb dependencies...
Library Manager: Installing git+https://github.com/JChristensen/Timer @ 2.1
git version 2.34.1
Cloning into '/home/marcosjl/.platformio/.cache/tmp/pkg-installing-_pz60wuc'...

Resolving cyd2usb dependencies...
PackageException: Package version 0.0.0+20241116115333.sha.bfef590 doesn't satisfy requirements 2.1 based on PackageMetadata <type=library name=Timer version=0.0.0+20241116115333.sha.bfef590 spec={'owner': None, 'id': None, 'name': 'Timer', 'requirements': '2.1', 'uri': 'git+https://github.com/JChristensen/Timer'}

Library Manager: Installing git+https://github.com/JChristensen/Timer @ 2.1
git version 2.34.1
Cloning into '/home/marcosjl/.platformio/.cache/tmp/pkg-installing-962_vtep'...

PackageException: Package version 0.0.0+20241116115333.sha.bfef590 doesn't satisfy requirements 2.1 based on PackageMetadata <type=library name=Timer version=0.0.0+20241116115333.sha.bfef590 spec={'owner': None, 'id': None, 'name': 'Timer', 'requirements': '2.1', 'uri': 'git+https://github.com/JChristensen/Timer'}

Any help greatly appreciated.
José

2

Wrong syntax, as already explained in

https://docs.platformio.org/en/latest/core/userguide/pkg/cmd_install.html#repository-git-hg-svn

You need

lib_deps =
  https://github.com/JChristensen/Timer#v2.0