diff --git a/cmake/std/atdm/common/toss3/environment_new.sh b/cmake/std/atdm/common/toss3/environment_new.sh
index 7577f41c60fc..e0cbd02ab66c 100755
--- a/cmake/std/atdm/common/toss3/environment_new.sh
+++ b/cmake/std/atdm/common/toss3/environment_new.sh
@@ -9,7 +9,7 @@
 echo "Using $ATDM_CONFIG_SYSTEM_NAME toss3 compiler stack $ATDM_CONFIG_COMPILER to build $ATDM_CONFIG_BUILD_TYPE code with Kokkos node type $ATDM_CONFIG_NODE_TYPE"
 
 export ATDM_CONFIG_ENABLE_SPARC_SETTINGS=ON
-export ATDM_CONFIG_USE_NINJA=ON
+export ATDM_CONFIG_USE_NINJA=OFF
 export ATDM_CONFIG_BUILD_COUNT=8
 # export ATDM_CONFIG_CMAKE_JOB_POOL_LINK=2
 # NOTE: Above, currently setting CMAKE_JOB_POOL_LINK results in a build
diff --git a/cmake/std/atdm/common/toss3/environment_tlcc2.sh b/cmake/std/atdm/common/toss3/environment_tlcc2.sh
index 702b638c7c78..484ffa80c7f3 100755
--- a/cmake/std/atdm/common/toss3/environment_tlcc2.sh
+++ b/cmake/std/atdm/common/toss3/environment_tlcc2.sh
@@ -12,7 +12,7 @@ fi
 
 echo "Using toss3 compiler stack $ATDM_CONFIG_COMPILER to build $ATDM_CONFIG_BUILD_TYPE code with Kokkos node type $ATDM_CONFIG_NODE_TYPE"
 
-export ATDM_CONFIG_USE_NINJA=ON
+export ATDM_CONFIG_USE_NINJA=OFF
 export ATDM_CONFIG_BUILD_COUNT=8
 # export ATDM_CONFIG_CMAKE_JOB_POOL_LINK=2
 # NOTE: Above, currently setting CMAKE_JOB_POOL_LINK results in a build