nfs-utils: add python3 to buildInputs

[FRidh]

This will rewrite the shebang of nfsiostat.

Motivation for this change

Fixes #48599

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.

---

[FRidh]

Closure size increases from 143 MB to 208 MB.

[GrahamcOfBorg]

No attempt on x86_64-darwin (full log)

The following builds were skipped because they don't evaluate on x86_64-darwin: nfs-utils

Partial log (click to expand)

a) For `nixos-rebuild` you can set
  { nixpkgs.config.allowUnsupportedSystem = true; }
in configuration.nix to override this.

b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
  { allowUnsupportedSystem = true; }
to ~/.config/nixpkgs/config.nix.

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: nfs-utils

Partial log (click to expand)

shrinking /nix/store/cwa96n59nfllry5ir667z8ng20jdr36d-nfs-utils-2.3.3-lib/lib/libnfsidmap.so.1.0.0
strip is /nix/store/vcc4svb8gy29g4pam2zja6llkbcwsyiq-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/cwa96n59nfllry5ir667z8ng20jdr36d-nfs-utils-2.3.3-lib/lib
patching script interpreter paths in /nix/store/cwa96n59nfllry5ir667z8ng20jdr36d-nfs-utils-2.3.3-lib
checking for references to /build in /nix/store/cwa96n59nfllry5ir667z8ng20jdr36d-nfs-utils-2.3.3-lib...
shrinking RPATHs of ELF executables and libraries in /nix/store/4lgza17i5zgjb9gw9zr1jg9ajvw38g9m-nfs-utils-2.3.3-man
gzipping man pages under /nix/store/4lgza17i5zgjb9gw9zr1jg9ajvw38g9m-nfs-utils-2.3.3-man/share/man/
strip is /nix/store/vcc4svb8gy29g4pam2zja6llkbcwsyiq-binutils-2.30/bin/strip
patching script interpreter paths in /nix/store/4lgza17i5zgjb9gw9zr1jg9ajvw38g9m-nfs-utils-2.3.3-man
checking for references to /build in /nix/store/4lgza17i5zgjb9gw9zr1jg9ajvw38g9m-nfs-utils-2.3.3-man...

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: nfs-utils

Partial log (click to expand)

shrinking /nix/store/xjskscy69ljk7kjsji4lraa60yxr7cng-nfs-utils-2.3.3-lib/lib/libnfsidmap.so.1.0.0
strip is /nix/store/p9akxn2sfy4wkhqdqa3li97pc6jaz3r1-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/xjskscy69ljk7kjsji4lraa60yxr7cng-nfs-utils-2.3.3-lib/lib
patching script interpreter paths in /nix/store/xjskscy69ljk7kjsji4lraa60yxr7cng-nfs-utils-2.3.3-lib
checking for references to /build in /nix/store/xjskscy69ljk7kjsji4lraa60yxr7cng-nfs-utils-2.3.3-lib...
shrinking RPATHs of ELF executables and libraries in /nix/store/ix47f7rvwib61dc6rnk384kznm78ljf3-nfs-utils-2.3.3-man
gzipping man pages under /nix/store/ix47f7rvwib61dc6rnk384kznm78ljf3-nfs-utils-2.3.3-man/share/man/
strip is /nix/store/p9akxn2sfy4wkhqdqa3li97pc6jaz3r1-binutils-2.30/bin/strip
patching script interpreter paths in /nix/store/ix47f7rvwib61dc6rnk384kznm78ljf3-nfs-utils-2.3.3-man
checking for references to /build in /nix/store/ix47f7rvwib61dc6rnk384kznm78ljf3-nfs-utils-2.3.3-man...

[xeji]

@GrahamcOfBorg test nfs4

[xeji]

@GrahamcOfBorg test nfs3

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: tests.nfs4

Partial log (click to expand)

syncing
client2: running command: sync
client2: exit status 0
test script finished in 500.34s
cleaning up
killing client2 (pid 654)
killing server (pid 750)
vde_switch: EOF on stdin, cleaning up and exiting
vde_switch: Could not remove ctl dir '/build/vde1.ctl': Directory not empty
/nix/store/0wb10a4ipjbqd2q3qj3m9iqmnhnk4c1p-vm-test-run-nfs

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: tests.nfs3

Partial log (click to expand)

syncing
client2: running command: sync
client2: exit status 0
test script finished in 671.33s
cleaning up
killing client2 (pid 654)
killing server (pid 775)
vde_switch: EOF on stdin, cleaning up and exiting
vde_switch: Could not remove ctl dir '/build/vde1.ctl': Directory not empty
/nix/store/dabg18di138m9k8lrb8y692yij0ccqag-vm-test-run-nfs

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: tests.nfs4

Partial log (click to expand)

syncing
client2: running command: sync
client2: exit status 0
test script finished in 370.29s
cleaning up
killing client2 (pid 625)
killing server (pid 725)
vde_switch: EOF on stdin, cleaning up and exiting
vde_switch: Could not remove ctl dir '/build/vde1.ctl': Directory not empty
/nix/store/r1izx8d0ym5iddylpqwbarlysbbnp970-vm-test-run-nfs

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: tests.nfs3

Partial log (click to expand)

syncing
client2: running command: sync
client2: exit status 0
test script finished in 1017.86s
cleaning up
killing server (pid 702)
killing client2 (pid 630)
vde_switch: EOF on stdin, cleaning up and exiting
vde_switch: Could not remove ctl dir '/build/vde1.ctl': Directory not empty
/nix/store/91n5byx91xph1i1jszqxngbq6hrkvxi4-vm-test-run-nfs