diff --git a/ocm-kit/flake.lock b/ocm-kit/flake.lock
index 09c9f74..a5f5840 100644
--- a/ocm-kit/flake.lock
+++ b/ocm-kit/flake.lock
@@ -90,11 +90,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1780434986,
-        "narHash": "sha256-y+HEGGFmDGO/hkRmBgt+bcGNsn7zt8UkM+KQnWhlk38=",
+        "lastModified": 1787634179,
+        "narHash": "sha256-AWTQezUEPRoxYGF/Fk9D7qyPng2oHpQNoQIMveGXVe8=",
         "owner": "purpleclay",
         "repo": "go-overlay",
-        "rev": "7f70305782ff557ca1e1c8f0dc9bdb71f6255122",
+        "rev": "6e18d32cc93c6e23db5d2ba1436923280853abe0",
         "type": "github"
       },
       "original": {
@@ -105,11 +105,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1780749050,
-        "narHash": "sha256-3av0pIjlOWQ6rDbNOmpUSvbNnJkGORQKKjb4LtCZsIY=",
+        "lastModified": 1787498568,
+        "narHash": "sha256-9i/VTdusq/+NM/tz+J1Re+ojkMB8MBf0QshnYfzHz30=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a799d3e3886da994fa307f817a6bc705ae538eeb",
+        "rev": "56c02bc00adcf003215cc4bd996d6efaf4cff188",
         "type": "github"
       },
       "original": {
diff --git a/ocm-kit/flake.nix b/ocm-kit/flake.nix
index eb28f9a..fbff576 100644
--- a/ocm-kit/flake.nix
+++ b/ocm-kit/flake.nix
@@ -5,7 +5,7 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
 
-    # Provides pinned Go toolchain versions as go_<major>_<minor> packages.
+    # Provides exact Go toolchains as `pkgs.go-bin.versions."X.Y.Z"`.
     go-overlay = {
       url = "github:purpleclay/go-overlay";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -25,9 +25,7 @@
           overlays = [ go-overlay.overlays.default ];
         };
 
-        goAttr = "go_" + builtins.concatStringsSep "_"
-          (pkgs.lib.take 2 (pkgs.lib.splitString "." goVersion));
-        go = pkgs.${goAttr};
+        go = pkgs.go-bin.versions.${goVersion};
       in
       {
         devShells.default = pkgs.mkShell {