nixpkgs: bump; rewrite snapshot patch as nixpkgs commit

overlays/cross.nix

@@ -675,11 +675,11 @@ in with final; {
   #   # '';
   # });
 
-  # 2025/08/26: upstreaming is unblocked, but not as simple as the glycin-loaders approach!
-  snapshot = prev.snapshot.override {
-    # fixes "error: linker `cc` not found"
-    cargo = crossCargo;
-  };
+  # 2025/08/26: upstreaming is unblocked; implemented on desko `pr-snapshot-cross` branch
+  # snapshot = prev.snapshot.override {
+  #   # fixes "error: linker `cc` not found"
+  #   cargo = crossCargo;
+  # };
 
   # 2025/08/26: upstreaming is unblocked; patched on desko branch `pr-spot-cross`
   # spot = prev.spot.override {

pkgs/by-name/nixpkgs-bootstrap/master.nix

@@ -14,8 +14,8 @@
   mkNixpkgs ? import ./mkNixpkgs.nix {},
 }:
 mkNixpkgs {
-  rev = "f39808415aee96e539b4c06fb5df23a872c63702";
-  sha256 = "sha256-XcMe9OxRtRN9pf6xHXYCl3vidRm9i98FGjYmdzVgtS0=";
+  rev = "2882c071a83fa909c4c3d171f65c71000e90f9fb";
+  sha256 = "sha256-q5G/GIlkYheWnM667b/mm1sVWK9FpncwQU8vdMIcJE0=";
   version = "unstable-2025-08-27";
   branch = "master";
 }

pkgs/by-name/nixpkgs-bootstrap/patches.nix

@@ -62,6 +62,12 @@ in
     hash = "sha256-B7s2aNVony+G7FW2PaR7FVO7zzWa7SiLONWRGrsXA3A=";
   })
 
+  (fetchpatch' {
+    name = "gmobile: set strictDeps, fix cross compilation";
+    saneCommit = "223b327fcc0775212bcc30a0bfb57c90ce5e3251";
+    hash = "sha256-ww6oAJF/AA6GhqJ1nS3QhHHcH7xiZUcNOKKvtE6NkGQ=";
+  })
+
   (fetchpatch' {
     # desko nixpkgs branch: `pr-papers-cross`
     name = "papers: fix cross compilation";
@@ -90,6 +96,13 @@ in
     hash = "sha256-ZDDRdGPpxER/i2trBDiovbIZc0Qe94iUp/XdWvIvG98=";
   })
 
+  (fetchpatch' {
+    # desko nixpkgs branch: `pr-snapshot-cross`
+    name = "snapshot: fix cross compilation";
+    saneCommit = "9bf01eef452d46c2990cdc872017f1015892ea7d";
+    hash = "sha256-F6RwprsXOWjk/xNHtBqQWge5edLGJeQUrupKZ1MNphU=";
+  })
+
   # (fetchpatch' {
   #   # opencv used by alpaca, newelle
   #   name = "opencv: fix cross compliation by patching protobuf";