diff options
Diffstat (limited to 'lib/trivial.nix')
| -rw-r--r-- | lib/trivial.nix | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/trivial.nix b/lib/trivial.nix index 18616a189c26..902c56a2d0aa 100644 --- a/lib/trivial.nix +++ b/lib/trivial.nix @@ -229,6 +229,13 @@ rec { */ inNixShell = builtins.getEnv "IN_NIX_SHELL" != ""; + /* Determine whether the function is being called from inside pure-eval mode + by seeing whether `builtins` contains `currentSystem`. If not, we must be in + pure-eval mode. + + Type: inPureEvalMode :: bool + */ + inPureEvalMode = ! builtins ? currentSystem; ## Integer operations |