In reply to @danielrf:matrix.org

diff --git a/flavors/lineageos/default.nix b/flavors/lineageos/default.nix
index 1216ca8..5407fc8 100644
--- a/flavors/lineageos/default.nix
+++ b/flavors/lineageos/default.nix
@@ -106,9 +106,9 @@ in mkIf (config.flavor == "lineageos")
         })
       ];
 
-      # LineageOS will sometimes force-push to this repo, and the older revisions are garbage collected.
-      # So we'll just build chromium webview ourselves.
-      "external/chromium-webview".enable = false;
+#      # LineageOS will sometimes force-push to this repo, and the older revisions are garbage collected.
+#      # So we'll just build chromium webview ourselves.
+#      "external/chromium-webview".enable = false;
     }
   ] ++ optionals (deviceMetadata ? "${config.device}") [
     # Device-specific source dirs
@@ -134,16 +134,16 @@ in mkIf (config.flavor == "lineageos")
   source.manifest.url = mkDefault "https://github.com/LineageOS/android.git";
   source.manifest.rev = mkDefault "refs/heads/${LineageOSRelease}";
 
-  # Enable robotnix-built chromium / webview
-  apps.chromium.enable = mkDefault true;
-  webview.chromium.availableByDefault = mkDefault true;
-  webview.chromium.enable = mkDefault true;
-
-  # This is the prebuilt webview apk from LineageOS. Adding this here is only
-  # for convenience if the end-user wants to set `webview.prebuilt.enable = true;`.
-  webview.prebuilt.apk = config.source.dirs."external/chromium-webview".src + "/prebuilt/${config.arch}/webview.apk";
-  webview.prebuilt.availableByDefault = mkDefault true;
-  removedProductPackages = [ "webview" ];
+#  # Enable robotnix-built chromium / webview
+#  apps.chromium.enable = mkDefault true;
+#  webview.chromium.availableByDefault = mkDefault true;
+#  webview.chromium.enable = mkDefault true;
+#
+#  # This is the prebuilt webview apk from LineageOS. Adding this here is only
+#  # for convenience if the end-user wants to set `webview.prebuilt.enable = true;`.
+#  webview.prebuilt.apk = config.source.dirs."external/chromium-webview".src + "/prebuilt/${config.arch}/webview.apk";
+#  webview.prebuilt.availableByDefault = mkDefault true;
+#  removedProductPackages = [ "webview" ];
 
   # Needed by included kernel build for some devices (pioneer at least)
   envPackages = [ pkgs.openssl.dev ] ++ optionals (config.androidVersion == 11) [ pkgs.gcc.cc pkgs.glibc.dev ];

# SPDX-FileCopyrightText: 2020 Daniel Fullmer and robotnix contributors
# SPDX-License-Identifier: MIT

{ config, pkgs, lib, ... }:
let
  inherit (lib)
    optional optionals optionalString optionalAttrs
    elem mapAttrs mapAttrs' nameValuePair filterAttrs
    attrNames getAttrs flatten remove
    mkIf mkMerge mkDefault mkForce
    importJSON toLower hasPrefix;

  androidVersionToLineageBranch = {
    "10" = "lineage-17.1";
    "11" = "lineage-18.1";
  };
  lineageBranchToAndroidVersion = mapAttrs' (name: value: nameValuePair value name) androidVersionToLineageBranch;

  deviceMetadata = lib.importJSON ./device-metadata.json;
  LineageOSRelease = androidVersionToLineageBranch.${builtins.toString config.androidVersion};
  repoDirs = lib.importJSON (./. + "/${LineageOSRelease}/repo.json");
  _deviceDirs = importJSON (./. + "/${LineageOSRelease}/device-dirs.json");
  vendorDirs = importJSON (./. + "/${LineageOSRelease}/vendor-dirs.json");

  # TODO: Condition on soc name?
  dtbReproducibilityFix = ''
    sed -i \
      's/^DTB_OBJS := $(shell find \(.*\))$/DTB_OBJS := $(sort $(shell find \1))/' \
      arch/arm64/boot/Makefile
  '';
  kernelsNeedFix = [
    # Only verified marlin reproducibility is fixed by this, however these other repos have the same issue
    "kernel/asus/sm8150"
    "kernel/bq/msm8953"
    "kernel/essential/msm8998"
    "kernel/google/marlin"
    "kernel/leeco/msm8996"
    "kernel/lge/msm8996"
    "kernel/motorola/msm8996"
    "kernel/motorola/msm8998"
    "kernel/motorola/sdm632"
    "kernel/nubia/msm8998"
    "kernel/oneplus/msm8996"
    "kernel/oneplus/sdm845"
    "kernel/oneplus/sm8150"
    "kernel/razer/msm8998"
    "kernel/samsung/sdm670"
    "kernel/sony/sdm660"
    "kernel/xiaomi/jason"
    "kernel/xiaomi/msm8998"
    "kernel/xiaomi/sdm660"
    "kernel/xiaomi/sdm845"
    "kernel/yandex/sdm660"
    "kernel/zuk/msm8996"
  ];
  # Patch kernels
  patchKernelDir = n: v: v // (optionalAttrs (hasPrefix "kernel/" n) {
    patches = config.kernel.patches;
    postPatch = config.kernel.postPatch
      + optionalString (config.useReproducibilityFixes && (elem n kernelsNeedFix)) ("\n" + dtbReproducibilityFix);
  });
  deviceDirs = mapAttrs patchKernelDir _deviceDirs;

  supportedDevices = attrNames deviceMetadata;

  # TODO: Move this filtering into vanilla/graphene
  filterDirAttrs = dir: filterAttrs (n: v: elem n [ "rev" "sha256" "url" "patches" "postPatch" ]) dir;
  filterDirsAttrs = dirs: mapAttrs (n: v: filterDirAttrs v) dirs;
in
mkIf (config.flavor == "lineageos")
{
  androidVersion =
    let
      defaultBranch = deviceMetadata.${config.device}.branch;
    in
    mkIf (deviceMetadata ? ${config.device}) (mkDefault (lib.toInt lineageBranchToAndroidVersion.${defaultBranch}));

  productNamePrefix = "lineage_"; # product names start with "lineage_"

  buildDateTime = mkDefault 1628634098;

  # LineageOS uses this by default. If your device supports it, I recommend using variant = "user"
  variant = mkDefault "userdebug";

  warnings = optional
    (
      (config.device != null) &&
      !(elem config.device supportedDevices) &&
      (config.deviceFamily != "generic")
    )
    "${config.device} is not an officially-supported device for LineageOS";

  source.dirs = mkMerge ([
    repoDirs

    {
      "vendor/lineage".patches = [
        ./0001-Remove-LineageOS-keys.patch
        (pkgs.substituteAll {
          src = ./0002-bootanimation-Reproducibility-fix.patch;
          inherit (pkgs) imagemagick;
        })
        ./0003-kernel-Set-constant-kernel-timestamp.patch
      ];
      "system/extras".patches = [
        # pkgutil.get_data() not working, probably because we don't use their compiled python
        (pkgs.fetchpatch {
          url = "https://github.com/LineageOS/android_system_extras/commit/7da4b29321eb7ebce9eb9a43d0fbd85d0aa1e870.patch";
          sha256 = "0pv56lypdpsn66s7ffcps5ykyfx0hjkazml89flj7p1px12zjhy1";
          revert = true;
        })
      ];

      # LineageOS will sometimes force-push to this repo, and the older revisions are garbage collected.
      # So we'll just build chromium webview ourselves.
      #      "external/chromium-webview".enable = false;
    }
  ] ++ optionals (deviceMetadata ? "${config.device}") [
    # Device-specific source dirs
    (
      let
        vendor = toLower deviceMetadata.${config.device}.vendor;
        relpathWithDependencies = relpath: [ relpath ] ++ (flatten (map (p: relpathWithDependencies p) deviceDirs.${relpath}.deps));
        relpaths = relpathWithDependencies "device/${vendor}/${config.device}";
        filteredRelpaths = remove (attrNames repoDirs) relpaths; # Remove any repos that we're already including from repo json
      in
      filterDirsAttrs (getAttrs filteredRelpaths deviceDirs)
    )

    # Vendor-specific source dirs
    (
      let
        _vendor = toLower deviceMetadata.${config.device}.vendor;
        vendor = if config.device == "shamu" then "motorola" else _vendor;
        relpath = "vendor/${vendor}";
      in
      filterDirsAttrs (getAttrs [ relpath ] vendorDirs)
    )
  ] ++ optional (config.device == "bacon")
    # Bacon needs vendor/oppo in addition to vendor/oneplus
    # See https://github.com/danielfullmer/robotnix/issues/26
    (filterDirsAttrs (getAttrs [ "vendor/oppo" ] vendorDirs))
  );

  source.manifest.url = mkDefault "https://github.com/LineageOS/android.git";
  source.manifest.rev = mkDefault "refs/heads/${LineageOSRelease}";

  # Enable robotnix-built chromium / webview
  #  apps.chromium.enable = mkDefault true;
  #  webview.chromium.availableByDefault = mkDefault true;
  #  webview.chromium.enable = mkDefault true;

  # This is the prebuilt webview apk from LineageOS. Adding this here is only
  # for convenience if the end-user wants to set `webview.prebuilt.enable = true;`.
  #  webview.prebuilt.apk = config.source.dirs."external/chromium-webview".src + "/prebuilt/${config.arch}/webview.apk";
  #  webview.prebuilt.availableByDefault = mkDefault true;
  #  removedProductPackages = [ "webview" ];

  # Needed by included kernel build for some devices (pioneer at least)
  envPackages = [ pkgs.openssl.dev ] ++ optionals (config.androidVersion == 11) [ pkgs.gcc.cc pkgs.glibc.dev ];

  envVars.RELEASE_TYPE = mkDefault "EXPERIMENTAL"; # Other options are RELEASE NIGHTLY SNAPSHOT EXPERIMENTAL

  # LineageOS flattens all APEX packages: https://review.lineageos.org/c/LineageOS/android_vendor_lineage/+/270212
  signing.apex.enable = false;
  # This environment variable is set in android/build.sh under https://github.com/lineageos-infra/build-config
  envVars.OVERRIDE_TARGET_FLATTEN_APEX = "true";

  # LineageOS needs this additional command line argument to enable
  # backuptool.sh, which runs scripts under /system/addons.d
  otaArgs = [ "--backup=true" ];
}