diff --git a/flake.lock b/flake.lock
index b8f8181..0b885d3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,37 +3,37 @@
     "determinate-nixd-aarch64-darwin": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-pQ7YeoB96bBl3iJGRdUWjdOFwahPUMwNN1yl9fwJufY=",
+        "narHash": "sha256-oz9PLBISeJ+ipMoi4xmcVG41P/Q8IcptQ62xAJ9ZiZg=",
         "type": "file",
-        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/macOS"
+        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/macOS"
       },
       "original": {
         "type": "file",
-        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/macOS"
+        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/macOS"
       }
     },
     "determinate-nixd-aarch64-linux": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-t6Tc358tx16GFely1je18dmrfB8Wv1FkV6nRnU7ITYY=",
+        "narHash": "sha256-tvhnv4tS6GIX0DkngUOxWcZ1wW+G7BEOTszojDNDBeY=",
         "type": "file",
-        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/aarch64-linux"
+        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/aarch64-linux"
       },
       "original": {
         "type": "file",
-        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/aarch64-linux"
+        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/aarch64-linux"
       }
     },
     "determinate-nixd-x86_64-linux": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-M5e/05UlhljIuqS2ZMozD3OJ2MTTYol9SxQwqrzJdkk=",
+        "narHash": "sha256-brJCRiMDagnf2TLZLAq7UVfKrgow7I/5uNIXfhZsEWA=",
         "type": "file",
-        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/x86_64-linux"
+        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/x86_64-linux"
       },
       "original": {
         "type": "file",
-        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/x86_64-linux"
+        "url": "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/x86_64-linux"
       }
     },
     "flake-compat": {
@@ -105,12 +105,12 @@
         "nixpkgs-regression": "nixpkgs-regression"
       },
       "locked": {
-        "lastModified": 1780939209,
-        "narHash": "sha256-/JuW5C6sWuC836Y9b7hga3ZvhRiY4k4Zs73RRg5KVWM=",
-        "rev": "952beffe9c45ed245d30209d4f17cf1d26654a2a",
-        "revCount": 26044,
+        "lastModified": 1783531012,
+        "narHash": "sha256-oR+h2cF6jderMyM+CMvGu/gbh8s3xceSY+oFqYOcrGg=",
+        "rev": "1318433ee92773c7c4ab7b3950c8c24d7a8bcc2b",
+        "revCount": 26214,
         "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/nix-src/3.21.1/019ea860-2acd-7680-ae61-10f9574b2694/source.tar.gz"
+        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/nix-src/3.21.5/019f42f2-bfcf-72d3-ba62-dd63f71ea07e/source.tar.gz"
       },
       "original": {
         "type": "tarball",
@@ -119,12 +119,12 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1773222311,
-        "narHash": "sha256-BHoB/XpbqoZkVYZCfXJXfkR+GXFqwb/4zbWnOr2cRcU=",
-        "rev": "0590cd39f728e129122770c029970378a79d076a",
-        "revCount": 909248,
+        "lastModified": 1782767157,
+        "narHash": "sha256-db/8NgfehQlPNt8rMY0J1gvwzTaURU/foM7y/AQimIM=",
+        "rev": "1d4e0f865d68258aada31e68e6d79c8c463f3b34",
+        "revCount": 914302,
         "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2511.909248%2Brev-0590cd39f728e129122770c029970378a79d076a/019ce32b-8ace-7339-b129-cceaa8dd10c6/source.tar.gz"
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2511.914302%2Brev-1d4e0f865d68258aada31e68e6d79c8c463f3b34/019f1c78-b5ab-7af2-8516-c0d5406b0646/source.tar.gz"
       },
       "original": {
         "type": "tarball",
@@ -165,12 +165,12 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1780930886,
-        "narHash": "sha256-rppURzHviaQN131F+nLiLdGfcb0uCd9gGP0E5+iw9MI=",
-        "rev": "8c3cede7ddc26bd659d2d383b5610efbd2c7a16e",
-        "revCount": 1012902,
+        "lastModified": 1782723713,
+        "narHash": "sha256-oPXCU/SSUokcGaJREHibG1CBX3+s/W7orDWQOZDsEeQ=",
+        "rev": "b5aa0fbd538984f6e3d201be0005b4463d8b09f8",
+        "revCount": 1024265,
         "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/nixpkgs-weekly/0.1.1012902%2Brev-8c3cede7ddc26bd659d2d383b5610efbd2c7a16e/019eab22-bd1e-7e40-b919-277db893c789/source.tar.gz"
+        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/nixpkgs-weekly/0.1.1024265%2Brev-b5aa0fbd538984f6e3d201be0005b4463d8b09f8/019f3b54-a452-7bf0-9017-aa0cf4ad1907/source.tar.gz"
       },
       "original": {
         "type": "tarball",
diff --git a/flake.nix b/flake.nix
index 8f5a9cf..ebaa51b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,15 +6,15 @@
     nixpkgs.url = "https://flakehub.com/f/DeterminateSystems/nixpkgs-weekly/0.1";
 
     determinate-nixd-aarch64-linux = {
-      url = "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/aarch64-linux";
+      url = "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/aarch64-linux";
       flake = false;
     };
     determinate-nixd-x86_64-linux = {
-      url = "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/x86_64-linux";
+      url = "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/x86_64-linux";
       flake = false;
     };
     determinate-nixd-aarch64-darwin = {
-      url = "https://install.determinate.systems/determinate-nixd/tag/v3.21.2/macOS";
+      url = "https://install.determinate.systems/determinate-nixd/tag/v3.21.5/macOS";
       flake = false;
     };
   };
diff --git a/tests/flake.nix b/tests/flake.nix
index e576dab..9696f49 100644
--- a/tests/flake.nix
+++ b/tests/flake.nix
@@ -1,7 +1,7 @@
 {
   inputs = {
     determinate.url = "path:../";
-    nixpkgs.follows = "determinate/nix/nixpkgs";
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/=0.2511";
     nix-darwin = {
       url = "https://flakehub.com/f/nix-darwin/nix-darwin/=0.2511";
       inputs.nixpkgs.follows = "nixpkgs";