Return a file that contains the list of direct and indirect references (the closure) of ITEM.

Return a derivation that builds a tree containing the `.go' files corresponding to MODULES. All the MODULES are built in a context where they can refer to each other. When TARGET is true, cross-compile MODULES for TARGET, a GNU triplet.

Return an object that is a symlink to TARGET.

Return a derivation NAME that runs EXP (a gexp) with GUILE-FOR-BUILD (a derivation) on SYSTEM; EXP is stored in a file called SCRIPT-NAME. When TARGET is true, it is used as the cross-compilation target triplet for packages referred to by EXP.

MODULES is deprecated in favor of 'with-imported-modules'. Its meaning is to make MODULES available in the evaluation context of EXP; MODULES is a list of names of Guile modules searched in MODULE-PATH to be copied in the store, compiled, and made available in the load path during the execution of EXP---e.g., '((guix build utils) (guix build gnu-build-system)).

EFFECTIVE-VERSION determines the string to use when adding extensions of EXP (see 'with-extensions') to the search path---e.g., "2.2".

GRAFT? determines whether packages referred to by EXP should be grafted when applicable.

When REFERENCES-GRAPHS is true, it must be a list of tuples of one of the following forms:

(FILE-NAME OBJ) (FILE-NAME OBJ OUTPUT) (FILE-NAME GEXP-INPUT) (FILE-NAME STORE-ITEM)

The right-hand-side of each element of REFERENCES-GRAPHS is automatically made an input of the build process of EXP. In the build environment, each FILE-NAME contains the reference graph of the corresponding item, in a simple text format.

ALLOWED-REFERENCES must be either #f or a list of output names and packages. In the latter case, the list denotes store items that the result is allowed to refer to. Any reference to another store item will lead to a build error. Similarly for DISALLOWED-REFERENCES, which can list items that must not be referenced by the outputs.

DEPRECATION-WARNINGS determines whether to show deprecation warnings while compiling modules. It can be #f, #t, or 'detailed.

The other arguments are as for 'derivation'.

Return a new <gexp-input> for the OUTPUT of THING; NATIVE? determines whether this should be considered a "native" input or not.

Return the S-expression corresponding to GEXP, but do not lower anything. As a result, the S-expression will be approximate if GEXP has references.

Return the OpenPGP key that signed COMMIT-ID (an OID). Raise an exception if the commit is unsigned, has an invalid signature, has a signature using one of the hash algorithms in DISALLOWED-HASH-ALGORITHMS, or if its signing key is not in KEYRING.

Read authorizations in the '.guix-authorizations' format from PORT, and return a list of authorized fingerprints.