README & CHANGELOG: disclaimer: effectful derivationStrict primOp

Author: Anton-Latukha

CHANGELOG.md

@@ -6,6 +6,8 @@
 
 ## [(diff)](https://github.com/haskell-nix/hnix/compare/0.11.1...0.12.0#files_bucket) 0.12.0 (2020-12-31)
 
+* *Disclaimer*: Current `derivationStrict` primOp implementation and so every evaluation of a derivation into a store path currently relies on the `hnix-store-remote`, which for those operations relies on the running `nix-daemon`, and so operations use/produce effects into the `/nix/store`. Be cautious - it is effectful.
+
 * Introduction:
   * New module `Nix.Effects.Derivation`.
   * Operations on derivations:

README.md

@@ -44,6 +44,8 @@ Parser, evaluator and type checker for the Nix language written in Haskell.
 ## Prerequisites
 Tooling is WIP, `nix-shell` and `nix-store` are still used for their purpose, so, to access them Nix is required to be installed.
 
+*Disclaimer*: Current `derivationStrict` primOp implementation and so every evaluation of a derivation into a store path currently relies on the `hnix-store-remote`, which for those operations relies on the running `nix-daemon`, and so operations use/produce effects into the `/nix/store`. Be cautious - it is effectful.
+
 ## Getting Started
 
 ```