Getting references graph at evaluation time

Development
1

Hello, I was wondering if it’s possible to introspect the Nix references graph at evaluation time.

I know it’s possible to get the references graph at build time using exportReferencesGraph. For instance, this derivation

pkgs.runCommand
  "test"
  { exportReferencesGraph = [ "bash-graph" pkgs.bash ]; }
  "mv bash-graph $out"

when built, produces the following file:

/nix/store/0hx32wk55ml88jrb1qxwg5c5yazfm6gf-bash-5.2-p15

2
/nix/store/0hx32wk55ml88jrb1qxwg5c5yazfm6gf-bash-5.2-p15
/nix/store/8xk4yl1r3n6kbyn05qhan7nbag7npymx-glibc-2.35-224
/nix/store/8xk4yl1r3n6kbyn05qhan7nbag7npymx-glibc-2.35-224

2
/nix/store/8xk4yl1r3n6kbyn05qhan7nbag7npymx-glibc-2.35-224
/nix/store/dh0jscni558i609q1s299qlrdbdj9jxa-libidn2-2.3.2
/nix/store/cnjwrrhnqn114jf5x0dwhx3jiaw6600d-libunistring-1.1

1
/nix/store/cnjwrrhnqn114jf5x0dwhx3jiaw6600d-libunistring-1.1
/nix/store/dh0jscni558i609q1s299qlrdbdj9jxa-libidn2-2.3.2

2
/nix/store/cnjwrrhnqn114jf5x0dwhx3jiaw6600d-libunistring-1.1
/nix/store/dh0jscni558i609q1s299qlrdbdj9jxa-libidn2-2.3.2

Is there a way to get something like this remaining in the Nix language itself?

I know that one could use an IFD to build that derivation at evaluation time but I would like to avoid IFDs if possible.

Thanks

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