diff --git a/pkgs/applications/version-management/gitlab/data.json b/pkgs/applications/version-management/gitlab/data.json
index a0e62271373..42cc127e40d 100644
--- a/pkgs/applications/version-management/gitlab/data.json
+++ b/pkgs/applications/version-management/gitlab/data.json
@@ -1,9 +1,9 @@
 {
-  "version": "12.4.1",
-  "repo_hash": "0dmb8ds6c5paxg35nricaywfhsgmp5rr46kk21hy2hsddgwkyb4k",
+  "version": "12.4.2",
+  "repo_hash": "00y8n0y7wydwxq62fyf7hcpx90zz5sw458m2773lz7pdgnpnrdc2",
   "owner": "gitlab-org",
   "repo": "gitlab",
-  "rev": "v12.4.1-ee",
+  "rev": "v12.4.2-ee",
   "passthru": {
     "GITALY_SERVER_VERSION": "1.67.0",
     "GITLAB_PAGES_VERSION": "1.11.0",
diff --git a/pkgs/applications/version-management/gitlab/default.nix b/pkgs/applications/version-management/gitlab/default.nix
index e6ed0ef53a2..0075f91ae2d 100644
--- a/pkgs/applications/version-management/gitlab/default.nix
+++ b/pkgs/applications/version-management/gitlab/default.nix
@@ -76,7 +76,7 @@ let
 
       bundle exec rake gettext:po_to_json RAILS_ENV=production NODE_ENV=production
       bundle exec rake rake:assets:precompile RAILS_ENV=production NODE_ENV=production
-      bundle exec rake webpack:compile RAILS_ENV=production NODE_ENV=production NODE_OPTIONS="--max_old_space_size=4096"
+      bundle exec rake webpack:compile RAILS_ENV=production NODE_ENV=production NODE_OPTIONS="--max_old_space_size=2048"
       bundle exec rake gitlab:assets:fix_urls RAILS_ENV=production NODE_ENV=production
 
       runHook postBuild
diff --git a/pkgs/applications/version-management/gitlab/gitaly/default.nix b/pkgs/applications/version-management/gitlab/gitaly/default.nix
index b07c3590d3d..dd17618dc74 100644
--- a/pkgs/applications/version-management/gitlab/gitaly/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitaly/default.nix
@@ -55,7 +55,7 @@ in buildGoPackage rec {
   meta = with stdenv.lib; {
     homepage = https://gitlab.com/gitlab-org/gitaly;
     description = "A Git RPC service for handling all the git calls made by GitLab";
-    platforms = platforms.unix;
+    platforms = platforms.linux;
     maintainers = with maintainers; [ roblabla globin fpletz ];
     license = licenses.mit;
   };
diff --git a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
index 03aad8c02c3..2a83cbe5f3c 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
@@ -25,7 +25,7 @@ buildGoPackage rec {
   meta = with stdenv.lib; {
     description = "SSH access and repository management app for GitLab";
     homepage = http://www.gitlab.com/;
-    platforms = platforms.unix;
+    platforms = platforms.linux;
     maintainers = with maintainers; [ fpletz globin talyz ];
     license = licenses.mit;
   };
diff --git a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
index b8364c1efeb..aa8cf7c164c 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
@@ -29,7 +29,7 @@ buildGoPackage rec {
 
   meta = with stdenv.lib; {
     homepage = http://www.gitlab.com/;
-    platforms = platforms.unix;
+    platforms = platforms.linux;
     maintainers = with maintainers; [ fpletz globin talyz ];
     license = licenses.mit;
   };