diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..3550a30f
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.lock b/flake.lock
index 685f6f60..55ad208f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1721379653,
-        "narHash": "sha256-8MUgifkJ7lkZs3u99UDZMB4kbOxvMEXQZ31FO3SopZ0=",
+        "lastModified": 1724819573,
+        "narHash": "sha256-GnR7/ibgIH1vhoy8cYdmXE6iyZqKqFxQSVkFgosBh6w=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1d9c2c9b3e71b9ee663d11c5d298727dace8d374",
+        "rev": "71e91c409d1e654808b2621f28a327acfdad8dc2",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 803222d6..c6523b8c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,5 +1,5 @@
 {
-  description = "Example C++ development environment for Zero to Nix";
+  description = "Molecular frequency-dependent response properties for arbitrary operators";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
diff --git a/pymolresponse/data/__init__.py b/pymolresponse/data/__init__.py
index 79a8070e..ece3e564 100644
--- a/pymolresponse/data/__init__.py
+++ b/pymolresponse/data/__init__.py
@@ -1,8 +1,11 @@
-from pathlib import Path
+try:
+    from importlib.resources import files
+except ImportError:
+    from importlib_resources import files
 
-_datadir = Path(__file__).resolve().parent
+_datadir = files("pymolresponse.data")
 COORDDIR = _datadir / "coords"
 REFDIR = _datadir / "reference"
 
-del Path
 del _datadir
+del files