diff --git a/flang/.drone.star b/flang/.drone.star
index 559207e52ff4..e6e23f14c1d4 100644
--- a/flang/.drone.star
+++ b/flang/.drone.star
@@ -10,7 +10,7 @@ def clang(arch):
                     "dnf -y install clang cmake ninja-build lld llvm-devel libcxx-devel diffutils",
                     "mkdir build && cd build",
                     'env CC=clang CXX=clang++ CXXFLAGS="-UNDEBUG -stdlib=libc++" LDFLAGS="-fuse-ld=lld" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ..',
-                    "ninja -j16",
+                    "ninja -j12",
                     "ctest --output-on-failure -j24",
                 ],
             },
@@ -30,7 +30,7 @@ def gcc(arch):
                         "dnf -y install cmake ninja-build g++ llvm-devel diffutils",
                         "mkdir build && cd build",
                         'env CC=gcc CXX=g++ CXXFLAGS="-UNDEBUG" LDFLAGS="-fuse-ld=gold" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ..',
-                        "ninja -j16",
+                        "ninja -j12",
                         "ctest --output-on-failure -j24",
                     ],
                 },