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-rw-r--r--nixpkgs/pkgs/development/compilers/openjdk/14.nix6
1 files changed, 6 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/openjdk/14.nix b/nixpkgs/pkgs/development/compilers/openjdk/14.nix
index 247cf941f002..29a5c3cc5c31 100644
--- a/nixpkgs/pkgs/development/compilers/openjdk/14.nix
+++ b/nixpkgs/pkgs/development/compilers/openjdk/14.nix
@@ -78,6 +78,12 @@ let
       "-lgtk-3" "-lgio-2.0" "-lgnomevfs-2" "-lgconf-2"
     ]);
 
+    # -j flag is explicitly rejected by the build system:
+    #     Error: 'make -jN' is not supported, use 'make JOBS=N'
+    # Note: it does not make build sequential. Build system
+    # still runs in parallel.
+    enableParallelBuilding = false;
+
     buildFlags = [ "all" ];
 
     installPhase = ''