diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1dc779de5..df494a6f9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -46,7 +46,7 @@ jobs:
           export OPAM_DISABLE_SANDBOXING=true
           TAG='"run_in_ci"' make run_config_filtered.json
           sed -i 's/--cpu-list 5/--cpu-list 1/g' run_config_filtered.json
-          OPT_WAIT=0 USE_SYS_DUNE_HACK=1 RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/5.3.0+trunk.bench
+          OPT_WAIT=0 USE_SYS_DUNE_HACK=0 RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/5.3.0+trunk.bench
           ls _results
           cat _results/*
           make json
@@ -61,7 +61,7 @@ jobs:
           sed -i 's/--cpu-list 5/--cpu-list 1/g' multicore_parallel_run_config_filtered.json
           sed -i 's/--cpu-list 5/--cpu-list 1/g' multicore_parallel_run_config_filtered_filtered.json
           make multicore_parallel_run_config_filtered_filtered_2domains.json
-          OPT_WAIT=0 USE_SYS_DUNE_HACK=1 BUILD_BENCH_TARGET=multibench_parallel RUN_CONFIG_JSON=multicore_parallel_run_config_filtered_filtered_2domains.json make ocaml-versions/5.3.0+trunk.bench
+          OPT_WAIT=0 USE_SYS_DUNE_HACK=0 BUILD_BENCH_TARGET=multibench_parallel RUN_CONFIG_JSON=multicore_parallel_run_config_filtered_filtered_2domains.json make ocaml-versions/5.3.0+trunk.bench
           ls _results
           cat _results/*
           make json
@@ -102,7 +102,7 @@ jobs:
           export OPAM_DISABLE_SANDBOXING=true
           TAG='"run_in_ci"' make run_config_filtered.json
           sed -i 's/--cpu-list 5/--cpu-list 1/g' run_config_filtered.json
-          OPT_WAIT=0 USE_SYS_DUNE_HACK=1 RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/5.2.1+trunk.bench
+          OPT_WAIT=0 USE_SYS_DUNE_HACK=0 RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/5.2.1+trunk.bench
           ls _results
           cat _results/*
           make json
@@ -117,7 +117,7 @@ jobs:
           sed -i 's/--cpu-list 5/--cpu-list 1/g' multicore_parallel_run_config_filtered.json
           sed -i 's/--cpu-list 5/--cpu-list 1/g' multicore_parallel_run_config_filtered_filtered.json
           make multicore_parallel_run_config_filtered_filtered_2domains.json
-          OPT_WAIT=0 USE_SYS_DUNE_HACK=1 BUILD_BENCH_TARGET=multibench_parallel RUN_CONFIG_JSON=multicore_parallel_run_config_filtered_filtered_2domains.json make ocaml-versions/5.2.1+trunk.bench
+          OPT_WAIT=0 USE_SYS_DUNE_HACK=0 BUILD_BENCH_TARGET=multibench_parallel RUN_CONFIG_JSON=multicore_parallel_run_config_filtered_filtered_2domains.json make ocaml-versions/5.2.1+trunk.bench
           ls _results
           cat _results/*
           make json
@@ -154,7 +154,7 @@ jobs:
           export OPAM_DISABLE_SANDBOXING=true
           TAG='"run_in_ci"' make run_config_filtered.json
           sed -i 's/--cpu-list 5/--cpu-list 1/g' run_config_filtered.json
-          OPT_WAIT=0 USE_SYS_DUNE_HACK=1 RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/4.14.0.bench
+          OPT_WAIT=0 USE_SYS_DUNE_HACK=0 RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/4.14.0.bench
           ls _results
           cat _results/*
 
@@ -168,7 +168,7 @@ jobs:
           sed -i 's/--cpu-list 5/--cpu-list 1/g' multicore_parallel_run_config_filtered.json
           sed -i 's/--cpu-list 5/--cpu-list 1/g' multicore_parallel_run_config_filtered_filtered.json
           make multicore_parallel_run_config_filtered_filtered_2domains.json
-          OPT_WAIT=0 USE_SYS_DUNE_HACK=1 BUILD_BENCH_TARGET=multibench_parallel RUN_CONFIG_JSON=multicore_parallel_run_config_filtered_filtered_2domains.json make ocaml-versions/4.14.0.bench || echo "Expected failure: Can't run parallel tests on 4.14.0"
+          OPT_WAIT=0 USE_SYS_DUNE_HACK=0 BUILD_BENCH_TARGET=multibench_parallel RUN_CONFIG_JSON=multicore_parallel_run_config_filtered_filtered_2domains.json make ocaml-versions/4.14.0.bench || echo "Expected failure: Can't run parallel tests on 4.14.0"
 
   test-notebooks:
     strategy:
diff --git a/run_all_custom.sh b/run_all_custom.sh
index bc17b643e..4f8048524 100644
--- a/run_all_custom.sh
+++ b/run_all_custom.sh
@@ -150,7 +150,7 @@ for i in $(seq 0 $((${COUNT} - 1))); do
             TAG=`echo "${TAG_STRING}"` make `echo ${CONFIG_RUN_JSON}`
 
             # Build and execute benchmarks
-            USE_SYS_DUNE_HACK=1 SANDMARK_URL="`echo ${CONFIG_URL}`" \
+            USE_SYS_DUNE_HACK=0 SANDMARK_URL="`echo ${CONFIG_URL}`" \
                 RUN_CONFIG_JSON="`echo ${CONFIG_RUN_JSON}`" \
                 ENVIRONMENT="`echo ${CONFIG_ENVIRONMENT}`" \
                 OCAML_CONFIG_OPTION="`echo ${CONFIG_OPTIONS}`" \
diff --git a/run_all_parallel.sh b/run_all_parallel.sh
index 13477c24a..ba5f6beb8 100644
--- a/run_all_parallel.sh
+++ b/run_all_parallel.sh
@@ -8,7 +8,7 @@
 
 TAG='"macro_bench"' make multicore_parallel_run_config_filtered.json
 
-USE_SYS_DUNE_HACK=1 \
+USE_SYS_DUNE_HACK=0 \
                  RUN_BENCH_TARGET=run_orunchrt \
                  BUILD_BENCH_TARGET=multibench_parallel \
                  RUN_CONFIG_JSON=multicore_parallel_run_config_filtered.json \
diff --git a/run_all_serial.sh b/run_all_serial.sh
index eed9e56bd..93e791580 100644
--- a/run_all_serial.sh
+++ b/run_all_serial.sh
@@ -2,7 +2,7 @@
 
 TAG='"macro_bench"' make run_config_filtered.json
 
-OPT_WAIT=0 USE_SYS_DUNE_HACK=1 \
+OPT_WAIT=0 USE_SYS_DUNE_HACK=0 \
 	SANDMARK_CUSTOM_NAME=5.1.0+trunk \
 	RUN_CONFIG_JSON=run_config_filtered.json \
 	make ocaml-versions/5.1.0+trunk.bench