Advance nixpkgs, and other inputs

README.md

@@ -33,7 +33,7 @@ cd .. && mv haskell-template ${NAME} && cd ${NAME}
 
 ## Tips
 
-- Run `nix flake update` to nixpkgs and other flake inputs.
+- Run `nix flake update` to update all flake inputs. nixpkgs is pinned to a specific a rev, which you can advance to the latest rev reported in [status.nixos.org](https://status.nixos.org).
 
 ## Alternatives
 

flake.lock

@@ -3,11 +3,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1627913399,
-        "narHash": "sha256-hY8g6H2KFL8ownSiFeMOjwPC8P0ueXpCVEbxgda3pko=",
+        "lastModified": 1641205782,
+        "narHash": "sha256-4jY7RCWUoZ9cKD8co0/4tFARpWB+57+r1bLLvXNJliY=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "12c64ca55c1014cdc1b16ed5a804aa8576601ff2",
+        "rev": "b7547d3eed6f32d06102ead8991ec52ab0a4f1a7",
         "type": "github"
       },
       "original": {
@@ -18,11 +18,11 @@
     },
     "flake-utils": {
       "locked": {
-        "lastModified": 1631561581,
-        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "lastModified": 1638122382,
+        "narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
         "type": "github"
       },
       "original": {
@@ -33,17 +33,17 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1638553308,
-        "narHash": "sha256-qlHRqp+7gJj+LUNfEl01M9xHQoX2Bx4e1ha/nssXSo8=",
+        "lastModified": 1641577433,
+        "narHash": "sha256-T7lS8vpbC3dgtrkb2ueC9HWaX4RYUwdP7IEttnvKQ8Y=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2df15ba83d0510a56f2583fd3481723835acb5a1",
+        "rev": "568e0bc498ee51fdd88e1e94089de05f2fdbd18b",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2df15ba83d0510a56f2583fd3481723835acb5a1",
+        "rev": "568e0bc498ee51fdd88e1e94089de05f2fdbd18b",
         "type": "github"
       }
     },

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "haskell-template's description";
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/2df15ba83d0510a56f2583fd3481723835acb5a1";
+    nixpkgs.url = "github:nixos/nixpkgs/568e0bc498ee51fdd88e1e94089de05f2fdbd18b";
     flake-utils.url = "github:numtide/flake-utils";
     flake-compat = {
       url = "github:edolstra/flake-compat";
@@ -38,6 +38,9 @@
             overrides = self: super: with pkgs.haskell.lib; {
               # Use callCabal2nix to override Haskell dependencies here
               # cf. https://tek.brick.do/K3VXJd8mEKO7
+              # Example: 
+              # > NanoID = self.callCabal2nix "NanoID" inputs.NanoID { };
+              # Assumes that you have the 'NanoID' flake input defined.
             };
             modifier = drv:
               pkgs.haskell.lib.addBuildTools drv