diff --git a/dv/uvm/core_ibex/Makefile b/dv/uvm/core_ibex/Makefile
index e6b6ede5..0af5792c 100644
--- a/dv/uvm/core_ibex/Makefile
+++ b/dv/uvm/core_ibex/Makefile
@@ -411,7 +411,7 @@ $(OUT-DIR)rtl_sim/.rtl.tb_compile.stamp: \
 	         --o=$(OUT-DIR) \
 	         --steps=compile \
 	         ${COMMON_OPTS} \
-	         --simulator="${SIMULATOR}" --simulator_yaml=yaml/rtl_simulation.yaml \
+	         --simulator="${SIMULATOR}" \
 	         $(cov-arg) $(wave-arg) $(cosim-arg) \
 	         --cmp_opts="${COMPILE_OPTS}"
 	$(call dump-vars,$(OUT-DIR)rtl_sim/.rtl.tb_compile.vars.mk,comp,$(tb-compile-var-deps))
@@ -450,7 +450,6 @@ $(rtl-sim-logs): \
 	$(verb)mkdir -p $(@D)
 	$(verb)./run_rtl.py \
 	         --simulator $(SIMULATOR) \
-	         --simulator_yaml yaml/rtl_simulation.yaml \
 	         $(cov-arg) $(wave-arg) \
 	         --start-seed $(SEED) \
 	         --sim-opts="+signature_addr=${SIGNATURE_ADDR} ${SIM_OPTS}" \
diff --git a/dv/uvm/core_ibex/run_rtl.py b/dv/uvm/core_ibex/run_rtl.py
index 0cd49f04..59a81c9b 100755
--- a/dv/uvm/core_ibex/run_rtl.py
+++ b/dv/uvm/core_ibex/run_rtl.py
@@ -86,7 +86,6 @@ def get_test_sim_cmd(base_cmd, test, idx, seed, sim_dir, bin_dir, lsf_cmd):
 def main() -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('--simulator', required=True)
-    parser.add_argument("--simulator_yaml", required=True)
     parser.add_argument("--en_cov", action='store_true')
     parser.add_argument("--en_wave", action='store_true')
     parser.add_argument('--start-seed', type=int, required=True)
@@ -116,8 +115,7 @@ def main() -> int:
         'cov_opts': args.en_cov,
         'wave_opts': args.en_wave
     }
-    _, base_cmd = get_simulator_cmd(args.simulator,
-                                    args.simulator_yaml, enables)
+    _, base_cmd = get_simulator_cmd(args.simulator, enables)
 
     # Specialize base_cmd with the right directories and simulator options
     sim_cmd = subst_vars(base_cmd,
diff --git a/dv/uvm/core_ibex/scripts/sim_cmd.py b/dv/uvm/core_ibex/scripts/sim_cmd.py
index 73bab6c8..9b16ab47 100644
--- a/dv/uvm/core_ibex/scripts/sim_cmd.py
+++ b/dv/uvm/core_ibex/scripts/sim_cmd.py
@@ -86,8 +86,11 @@ def subst_cmd(cmd, enable_dict, opts_dict, env_vars):
     return subst_env_vars(cmd, env_vars).replace('\n', ' ')
 
 
-def get_yaml_for_simulator(simulator, yaml_path):
-    '''Read yaml at yaml_path and find entry for simulator'''
+def get_yaml_for_simulator(simulator):
+    '''Get the entry for the simulator in RTL simulation yaml'''
+    yaml_dir = os.path.normpath(os.path.join(_THIS_DIR, '../yaml'))
+    yaml_path = os.path.join(yaml_dir, 'rtl_simulation.yaml')
+
     logging.info("Processing simulator setup file : %s" % yaml_path)
     for entry in read_yaml(yaml_path):
         if entry.get('tool') == simulator:
@@ -96,11 +99,10 @@ def get_yaml_for_simulator(simulator, yaml_path):
     raise RuntimeError("Cannot find RTL simulator {}".format(simulator))
 
 
-def get_simulator_cmd(simulator, yaml_path, enables):
+def get_simulator_cmd(simulator, enables):
     '''Get compile and run commands for the testbench
 
-    simulator is the name of the simulator to use. yaml_path is the path to a
-    yaml file describing various command line options. enables is a dictionary
+    simulator is the name of the simulator to use. enables is a dictionary
     keyed by option names with boolean values: true if the option is enabled.
 
     Returns (compile_cmds, sim_cmd), which are the simulator commands to
@@ -108,7 +110,7 @@ def get_simulator_cmd(simulator, yaml_path, enables):
     strings (multiple commands); sim_cmd is a single string.
 
     '''
-    entry = get_yaml_for_simulator(simulator, yaml_path)
+    entry = get_yaml_for_simulator(simulator)
     env_vars = entry.get('env_var', '')
 
     return ([subst_cmd(arg, enables, entry['compile'], env_vars)
diff --git a/dv/uvm/core_ibex/sim.py b/dv/uvm/core_ibex/sim.py
index dda35a7a..959831af 100755
--- a/dv/uvm/core_ibex/sim.py
+++ b/dv/uvm/core_ibex/sim.py
@@ -176,11 +176,6 @@ def main():
                         help="Output directory name")
     parser.add_argument("--simulator", type=str, default="vcs",
                         help="RTL simulator to use (default: vcs)")
-    parser.add_argument("--simulator_yaml",
-                        help="RTL simulator setting YAML",
-                        default=os.path.join(_CORE_IBEX,
-                                             'yaml',
-                                             'rtl_simulation.yaml'))
     parser.add_argument("-v", "--verbose", dest="verbose", action="store_true",
                         help="Verbose logging")
     parser.add_argument("--cmp_opts", type=str, default="",
@@ -223,8 +218,7 @@ def main():
             'wave_opts': args.en_wave,
             'cosim_opts': args.en_cosim
         }
-        compile_cmds, sim_cmd = get_simulator_cmd(args.simulator,
-                                                  args.simulator_yaml, enables)
+        compile_cmds, sim_cmd = get_simulator_cmd(args.simulator, enables)
 
         rtl_compile(compile_cmds, output_dir, args.lsf_cmd, args.cmp_opts)