diff --git a/flake.lock b/flake.lock
index 4cbad8a..1161702 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,7 +2,9 @@
   "nodes": {
     "actual": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": [
+          "nixpkgs-unstable"
+        ]
       },
       "locked": {
         "lastModified": 1725392458,
@@ -133,6 +135,26 @@
         "type": "github"
       }
     },
+    "home-manager-unstable": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs-unstable"
+        ]
+      },
+      "locked": {
+        "lastModified": 1727346017,
+        "narHash": "sha256-z7OCFXXxIseJhEHiCkkUOkYxD9jtLU8Kf5Q9WC0SjJ8=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "c124568e1054a62c20fbe036155cc99237633327",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
     "home-manager_2": {
       "inputs": {
         "nixpkgs": [
@@ -156,21 +178,21 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1725103162,
-        "narHash": "sha256-Ym04C5+qovuQDYL/rKWSR+WESseQBbNAe5DsXNx5trY=",
+        "lastModified": 1727264057,
+        "narHash": "sha256-KQPI8CTTnB9CrJ7LrmLC4VWbKZfljEPBXOFGZFRpxao=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "12228ff1752d7b7624a54e9c1af4b222b3c1073b",
+        "rev": "759537f06e6999e141588ff1c9be7f3a5c060106",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "nixos-24.05",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
-    "nixpkgsSmall": {
+    "nixpkgs-small": {
       "locked": {
         "lastModified": 1727284797,
         "narHash": "sha256-roj2jFZ/VNBQBBmUvvYRGiWbegZEgRk9Y1dhcY8kgLA=",
@@ -186,18 +208,34 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1727264057,
-        "narHash": "sha256-KQPI8CTTnB9CrJ7LrmLC4VWbKZfljEPBXOFGZFRpxao=",
+        "lastModified": 1727122398,
+        "narHash": "sha256-o8VBeCWHBxGd4kVMceIayf5GApqTavJbTa44Xcg5Rrk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "759537f06e6999e141588ff1c9be7f3a5c060106",
+        "rev": "30439d93eb8b19861ccbe3e581abf97bdc91b093",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.05",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable-small": {
+      "locked": {
+        "lastModified": 1727320268,
+        "narHash": "sha256-B4AK91+9frHerQ6mFAtaR46ECMRtZufrtXFj/b5NqYU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ea2838e1ce0a9da2abf88275843aca29d9f82b30",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable-small",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -220,10 +258,10 @@
     "plasma-manager": {
       "inputs": {
         "home-manager": [
-          "home-manager"
+          "home-manager-unstable"
         ],
         "nixpkgs": [
-          "nixpkgs"
+          "nixpkgs-unstable"
         ]
       },
       "locked": {
@@ -263,8 +301,11 @@
         "birdsong": "birdsong",
         "colmena": "colmena",
         "home-manager": "home-manager_2",
-        "nixpkgs": "nixpkgs_2",
-        "nixpkgsSmall": "nixpkgsSmall",
+        "home-manager-unstable": "home-manager-unstable",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-small": "nixpkgs-small",
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "nixpkgs-unstable-small": "nixpkgs-unstable-small",
         "nur": "nur",
         "plasma-manager": "plasma-manager",
         "randomcat": "randomcat"
diff --git a/flake.nix b/flake.nix
index ea28d43..a011d17 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,20 +1,27 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
-
-    nixpkgsSmall.url = "github:NixOS/nixpkgs/nixos-24.05-small";
+    nixpkgs-small.url = "github:NixOS/nixpkgs/nixos-24.05-small";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs-unstable-small.url = "github:NixOS/nixpkgs/nixos-unstable-small";
 
     home-manager = {
       url = "github:nix-community/home-manager/release-24.05";
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
-    plasma-manager = {
-      url = "github:nix-community/plasma-manager";
-      inputs.nixpkgs.follows = "nixpkgs";
-      inputs.home-manager.follows = "home-manager";
+    home-manager-unstable = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
     };
 
+    plasma-manager = {
+      url = "github:nix-community/plasma-manager";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
+      inputs.home-manager.follows = "home-manager-unstable";
+    };
+
+    # TODO: remove dependency on NUR (#16)
     nur.url = "github:nix-community/NUR";
 
     agenix = {
@@ -33,11 +40,17 @@
       flake = false;
     };
 
-    actual.url = "git+https://git.xeno.science/xenofem/actual-nix?ref=main";
+    # Third-party flake providing package and NixOS module for Actual Budget as
+    # nixpkgs are having trouble: https://github.com/NixOS/nixpkgs/issues/269069
+    actual = {
+      url = "git+https://git.xeno.science/xenofem/actual-nix?ref=main";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
+    };
+
     birdsong.url = "git+https://git.qenya.tel/qenya/birdsong?ref=main";
   };
 
-  outputs = inputs@{ self, nixpkgs, nixpkgsSmall, home-manager, plasma-manager, nur, agenix, colmena, randomcat, actual, birdsong, ... }: {
+  outputs = inputs@{ self, nixpkgs, nixpkgs-small, home-manager, plasma-manager, nur, agenix, colmena, randomcat, actual, birdsong, ... }: {
     nixosConfigurations = (colmena.lib.makeHive self.outputs.colmena).nodes;
 
     # The name of this output type is not standardised. I have picked
@@ -61,9 +74,9 @@
         nodeNixpkgs = {
           kilgharrah = import nixpkgs { system = "x86_64-linux"; };
           tohru = import nixpkgs { system = "x86_64-linux"; };
-          yevaud = import nixpkgsSmall { system = "x86_64-linux"; };
-          orm = import nixpkgsSmall { system = "x86_64-linux"; };
-          kalessin = import nixpkgsSmall { system = "aarch64-linux"; };
+          yevaud = import nixpkgs-small { system = "x86_64-linux"; };
+          orm = import nixpkgs-small { system = "x86_64-linux"; };
+          kalessin = import nixpkgs-small { system = "aarch64-linux"; };
         };
         specialArgs = { inherit self; };
       };