source common.sh clearStore nix eval '(assert 1 + 2 == 3; true)' [[ $(nix eval --impure '(builtins.readFile ./pure-eval.sh)') =~ clearStore ]] (! nix eval '(builtins.readFile ./pure-eval.sh)') (! nix eval '(builtins.currentTime)') (! nix eval '(builtins.currentSystem)') (! nix-instantiate --pure-eval ./simple.nix) [[ $(nix eval --impure "((import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; })).x)") == 123 ]] (! nix eval "((import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; })).x)") nix eval "((import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; sha256 = \"$(nix hash-file pure-eval.nix --type sha256)\"; })).x)"