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-rw-r--r--users/sterni/nix/misc/default.nix18
l---------users/sterni/nix/misc/guinea-pig1
2 files changed, 19 insertions, 0 deletions
diff --git a/users/sterni/nix/misc/default.nix b/users/sterni/nix/misc/default.nix
new file mode 100644
index 000000000000..1de9c973ec84
--- /dev/null
+++ b/users/sterni/nix/misc/default.nix
@@ -0,0 +1,18 @@
+{ ... }:
+
+let
+  /* Returns true if it is being evaluated using restrict-eval, false if not.
+     It's more robust than using `builtins.getEnv` since it isn't fooled by
+     `env -i`.
+
+     See https://github.com/NixOS/nix/issues/6579 for a description of the
+     behavior. Precise cause in the evaluator / store implementation is unclear.
+
+     Type: bool
+  */
+  inRestrictedEval = builtins.pathExists (toString ./guinea-pig + "/.");
+in
+
+{
+  inherit inRestrictedEval;
+}
diff --git a/users/sterni/nix/misc/guinea-pig b/users/sterni/nix/misc/guinea-pig
new file mode 120000
index 000000000000..73537e478e3f
--- /dev/null
+++ b/users/sterni/nix/misc/guinea-pig
@@ -0,0 +1 @@
+default.nix
\ No newline at end of file