lix/lix/libexpr/builtins/derivationStrict.md

name, args, renameInGlobalScope

name	args	renameInGlobalScope
derivationStrict	args	false

Constructs a store derivation from the attribute set args (c.f. derivation. Unlike derivation the produced store derivation is placed in the store immediately when this builtin is called, while derivation may defer placing store derivations in the store until it is proven that they are used.

It then returns a new attrset with only the following attributes:

• drvPath containing the path of the store derivation;
• For each output of the derivation (out, dev, etc): an attribute named after that output containing the output path

Note

In contrast to builtins.derivation, this computes the derivation set in a fully strict manner, i.e. the values of the attributes directly computed, whereas using builtins.derivation will produce an attrset whose values will be evaluated when they are used at a later point.