Flake devShell warning

When i rebuild my flake I always get the Warning

warning: flake output attribute 'devShell' is deprecated; use 'devShells.<system>.default' instead

If I change

devShell.x86_64-linux =  ....


devShells.x86_64-linux.default =  ....

I get the error

error: flake 'git+file:///home/florian/nixosconfiguration' does not provide attribute 'devShells.x86_64-linux.default', 'devShell.x86_64-linux', 'packages.x86_64-linux.default' or 'defaultPackage.x86_64-linux'
       Did you mean one of devsShell or devsShell?

What am I doing wrong? I thought this is what I had to do according to the warning.

It seems you misspelled it as devsShell in your actual flake.nix

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