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-rw-r--r--pkgs/development/compilers/openjdk/openjfx/11.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/compilers/openjdk/openjfx/11.nix b/pkgs/development/compilers/openjdk/openjfx/11.nix
index d5ec912bfed..6d550538b08 100644
--- a/pkgs/development/compilers/openjdk/openjfx/11.nix
+++ b/pkgs/development/compilers/openjdk/openjfx/11.nix
@@ -42,6 +42,7 @@ let
     buildPhase = ''
       runHook preBuild
 
+      export NUMBER_OF_PROCESSORS=$NIX_BUILD_CORES
       export GRADLE_USER_HOME=$(mktemp -d)
       ln -s $config gradle.properties
       export NIX_CFLAGS_COMPILE="$(pkg-config --cflags glib-2.0) $NIX_CFLAGS_COMPILE"