diff --git a/.gitignore b/.gitignore
index aaf410d..e4da180 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 result
 build
+
+# ignore lgx builds
+lez-explorer-ui-*-lgx-*
\ No newline at end of file
diff --git a/flake.lock b/flake.lock
index fe08f56..f0d7218 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,17 +2,17 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1751274312,
-        "narHash": "sha256-/bVBlRpECLVzjV19t5KMdMFWSwKLtb5RyXdjz3LJT+g=",
+        "lastModified": 1759036355,
+        "narHash": "sha256-0m27AKv6ka+q270dw48KflE0LwQYrO7Fm4/2//KCVWg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "50ab793786d9de88ee30ec4e4c24fb4236fc2674",
+        "rev": "e9f00bd893984bc8ce46c895c3bf7cac95331127",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.11",
         "repo": "nixpkgs",
+        "rev": "e9f00bd893984bc8ce46c895c3bf7cac95331127",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index 63a354d..7cc5aee 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,13 @@
   description = "LEZ Explorer UI - A Qt block explorer for the Logos Execution Zone";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+    # Pinned to the EXACT nixpkgs revision basecamp resolves via logos-nix, so this
+    # in-process `type: ui` module links the identical qtbase (6.9.2) and does not
+    # load a second QtCore into basecamp's process (which aborts with "Must construct
+    # a QApplication before a QWidget"). Matching the version string is not enough —
+    # the store path must match, so this must be re-pinned whenever basecamp bumps its
+    # logos-nix/nixpkgs lock.
+    nixpkgs.url = "github:NixOS/nixpkgs/e9f00bd893984bc8ce46c895c3bf7cac95331127";
   };
 
   outputs = { self, nixpkgs }: