element-desktop.keytar: build against electron's node headers (#384979)

fixes crash on startup of element-desktop

pkgs/by-name/el/element-desktop/keytar/default.nix

@@ -10,11 +10,18 @@
   xcbuild,
   fetchNpmDeps,
   npmHooks,
+  electron,
+  runCommand,
 }:
 
 let
   pinData = lib.importJSON ./pin.json;
 
+  electron-headers = runCommand "electron-headers" { } ''
+    mkdir -p $out
+    tar -C $out --strip-components=1 -xvf ${electron.headers}
+  '';
+
 in
 stdenv.mkDerivation rec {
   pname = "keytar";
@@ -48,8 +55,10 @@ stdenv.mkDerivation rec {
     export -f pkg-config
   '';
 
-  # https://nodejs.org/api/os.html#osarch
   npmFlags = [
+    # Make sure the native modules are built against electron's ABI
+    "--nodedir=${electron-headers}"
+    # https://nodejs.org/api/os.html#osarch
     "--arch=${
       if stdenv.hostPlatform.parsed.cpu.name == "i686" then
         "ia32"

pkgs/by-name/el/element-desktop/package.nix

@@ -23,9 +23,11 @@ let
   pinData = import ./element-desktop-pin.nix;
   inherit (pinData.hashes) desktopSrcHash desktopYarnHash;
   executableName = "element-desktop";
-  keytar = callPackage ./keytar { };
-  seshat = callPackage ./seshat { };
   electron = electron_33;
+  keytar = callPackage ./keytar {
+    inherit electron;
+  };
+  seshat = callPackage ./seshat { };
 in
 stdenv.mkDerivation (
   finalAttrs: