openjdk: expliictly mark as 'enableParallelBuilding = false;'

Note: this change does not make build sequential. Build system still
uses it's way to parallelize the build.

The only effect of this change is not to pass unsupported -j option
to Makefile when nixpkgs default will be switched to

    enableParallelBuilding = true;

pkgs/development/compilers/openjdk/11.nix

@@ -74,6 +74,12 @@ 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 = ''

pkgs/development/compilers/openjdk/12.nix

@@ -83,6 +83,12 @@ 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 = ''

pkgs/development/compilers/openjdk/13.nix

@@ -83,6 +83,12 @@ 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 = ''

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 = ''

pkgs/development/compilers/openjdk/15.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 = ''

pkgs/development/compilers/openjdk/16.nix

@@ -84,6 +84,12 @@ 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 = ''

pkgs/development/compilers/openjdk/17.nix

@@ -86,6 +86,12 @@ 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 = [ "images" ];
 
     installPhase = ''

pkgs/development/compilers/openjdk/8.nix

@@ -155,6 +155,12 @@ let
       "-lgtk-x11-2.0" "-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" ];
 
     doCheck = false; # fails with "No rule to make target 'y'."