diff --git a/src/V3HierBlock.cpp b/src/V3HierBlock.cpp
index 853bc41eb..b9e985837 100644
--- a/src/V3HierBlock.cpp
+++ b/src/V3HierBlock.cpp
@@ -115,6 +115,8 @@ static void V3HierWriteCommonInputs(const V3HierBlock* hblockp, std::ostream* of
     if (hblockp) topModuleFile = hblockp->vFileIfNecessary();
     if (!forCMake) {
         if (!topModuleFile.empty()) *of << topModuleFile << "\n";
+        const V3StringList& vFiles = v3Global.opt.vFiles();
+        for (const string& i : vFiles) *of << i << "\n";
     }
     const V3StringSet& libraryFiles = v3Global.opt.libraryFiles();
     for (const string& i : libraryFiles) {
@@ -253,7 +255,7 @@ void V3HierBlock::writeCommandArgsFile(bool forCMake) const {
     for (const string& opt : commandOpts) *of << opt << "\n";
     *of << hierBlockArgs().front() << "\n";
     for (const auto& hierblockp : m_children) *of << hierblockp->hierBlockArgs().front() << "\n";
-    *of << v3Global.opt.allArgsStringForHierBlock(false, forCMake) << "\n";
+    *of << v3Global.opt.allArgsStringForHierBlock(false) << "\n";
 }
 
 string V3HierBlock::commandArgsFilename(bool forCMake) const {
@@ -477,7 +479,7 @@ void V3HierBlockPlan::writeCommandArgsFiles(bool forCMake) const {
     }
     *of << "--threads " << cvtToStr(v3Global.opt.threads()) << "\n";
     *of << (v3Global.opt.systemC() ? "--sc" : "--cc") << "\n";
-    *of << v3Global.opt.allArgsStringForHierBlock(true, forCMake) << "\n";
+    *of << v3Global.opt.allArgsStringForHierBlock(true) << "\n";
 }
 
 string V3HierBlockPlan::topCommandArgsFilename(bool forCMake) {
diff --git a/src/V3Options.cpp b/src/V3Options.cpp
index 422c09a30..8131f3c6e 100644
--- a/src/V3Options.cpp
+++ b/src/V3Options.cpp
@@ -412,7 +412,7 @@ string V3Options::allArgsString() const VL_MT_SAFE {
 }
 
 // Delete some options for Verilation of the hierarchical blocks.
-string V3Options::allArgsStringForHierBlock(bool forTop, bool forCMake) const {
+string V3Options::allArgsStringForHierBlock(bool forTop) const {
     std::set<string> vFiles;
     for (const auto& vFile : m_vFiles) vFiles.insert(vFile);
     string out;
@@ -443,7 +443,7 @@ string V3Options::allArgsStringForHierBlock(bool forTop, bool forCMake) const {
                 continue;
             }
         } else {  // Not an option
-            if ((forCMake && vFiles.find(arg) != vFiles.end())  // Remove HDL
+            if (vFiles.find(arg) != vFiles.end()  // Remove HDL
                 || m_cppFiles.find(arg) != m_cppFiles.end()) {  // Remove C++
                 continue;
             }
@@ -549,9 +549,10 @@ string V3Options::filePathCheckOneDir(const string& modname, const string& dirna
 // 3: Delete the option and its argument if it is a number
 int V3Options::stripOptionsForChildRun(const string& opt, bool forTop) {
     if (opt == "j") return 3;
-    if (opt == "Mdir" || opt == "clk" || opt == "lib-create" || opt == "f" || opt == "v"
-        || opt == "l2-name" || opt == "mod-prefix" || opt == "prefix" || opt == "protect-lib"
-        || opt == "protect-key" || opt == "threads" || opt == "top-module") {
+    if (opt == "Mdir" || opt == "clk" || opt == "lib-create" || opt == "f" || opt == "F"
+        || opt == "v" || opt == "l2-name" || opt == "mod-prefix" || opt == "prefix"
+        || opt == "protect-lib" || opt == "protect-key" || opt == "threads"
+        || opt == "top-module") {
         return 2;
     }
     if (opt == "build" || (!forTop && (opt == "cc" || opt == "exe" || opt == "sc"))
diff --git a/src/V3Options.h b/src/V3Options.h
index a1e9b1b0c..e1486aeda 100644
--- a/src/V3Options.h
+++ b/src/V3Options.h
@@ -727,7 +727,7 @@ public:
     string allArgsString() const VL_MT_SAFE;  ///< Return all passed arguments as simple string
     // Return options for child hierarchical blocks when forTop==false, otherwise returns args for
     // the top module.
-    string allArgsStringForHierBlock(bool forTop, bool forCMake) const;
+    string allArgsStringForHierBlock(bool forTop) const;
     void parseOpts(FileLine* fl, int argc, char** argv) VL_MT_DISABLED;
     void parseOptsList(FileLine* fl, const string& optdir, int argc, char** argv) VL_MT_DISABLED;
     void parseOptsFile(FileLine* fl, const string& filename, bool rel) VL_MT_DISABLED;
diff --git a/test_regress/t/t_hier_block_import.py b/test_regress/t/t_hier_block_import.py
new file mode 100755
index 000000000..d9142462d
--- /dev/null
+++ b/test_regress/t/t_hier_block_import.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2024 by Wilson Snyder. This program is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+import vltest_bootstrap
+
+test.scenarios('vlt_all')
+
+# stats will be deleted but generation will be skipped if libs of hierarchical blocks exist.
+test.clean_objs()
+
+test.setenv('TEST_ROOT', test.t_dir + "/t_hier_block_import")
+
+# CI environment offers 2 VCPUs, 2 thread setting causes the following warning.
+# %Warning-UNOPTTHREADS: Thread scheduler is unable to provide requested parallelism; consider asking for fewer threads.
+# So use 6 threads here though it's not optimal in performance, but ok.
+
+test.compile(verilator_flags2=[
+    '$TEST_ROOT/t_hier_block_import_def.vh', '-f $TEST_ROOT/t_hier_block_import_args.f',
+    '-I$TEST_ROOT'
+],
+             threads=(6 if test.vltmt else 1))
+
+test.execute()
+
+test.file_grep(test.obj_dir + "/VsubA/subA.sv", r'^module\s+(\S+)\s+', "subA")
+test.file_grep(test.stats, r'HierBlock,\s+Hierarchical blocks\s+(\d+)', 2)
+
+test.passes()
diff --git a/test_regress/t/t_hier_block_import.v b/test_regress/t/t_hier_block_import.v
new file mode 100644
index 000000000..c2ad81e44
--- /dev/null
+++ b/test_regress/t/t_hier_block_import.v
@@ -0,0 +1,30 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// Copyright 2024 by Antmicro. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+module t(/*AUTOARG*/
+   // inputs
+   clk
+);
+   input clk;
+   bit [31:0] outA;
+   bit [31:0] outB;
+
+   subA subA(.out(outA));
+   subB subB(.out(outB));
+
+   always @(posedge clk) begin
+      if (outA == `VALUE_A && outB == `VALUE_B) begin
+         $write("*-* All Finished *-*\n");
+         $finish;
+      end
+      else begin
+         $write("Mismatch\n");
+         $stop;
+      end
+   end
+endmodule
diff --git a/test_regress/t/t_hier_block_import/t_hier_block_import.vh b/test_regress/t/t_hier_block_import/t_hier_block_import.vh
new file mode 100644
index 000000000..d0cc5e74d
--- /dev/null
+++ b/test_regress/t/t_hier_block_import/t_hier_block_import.vh
@@ -0,0 +1,13 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// Copyright 2024 by Wilson Snyder. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+// No include guards to validate if included once.
+
+parameter param_t pt = '{
+    PARAM_VALUE: `VALUE_A
+}
diff --git a/test_regress/t/t_hier_block_import/t_hier_block_import_args.f b/test_regress/t/t_hier_block_import/t_hier_block_import_args.f
new file mode 100644
index 000000000..11c92e3ab
--- /dev/null
+++ b/test_regress/t/t_hier_block_import/t_hier_block_import_args.f
@@ -0,0 +1,11 @@
+# Copyright 2024 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+--stats
+--hierarchical
+$TEST_ROOT/t_hier_block_import_subA.v
+-v $TEST_ROOT/t_hier_block_import_subB.v
+$TEST_ROOT/t_hier_block_import_subsub.v
diff --git a/test_regress/t/t_hier_block_import/t_hier_block_import_def.vh b/test_regress/t/t_hier_block_import/t_hier_block_import_def.vh
new file mode 100644
index 000000000..e2877ac06
--- /dev/null
+++ b/test_regress/t/t_hier_block_import/t_hier_block_import_def.vh
@@ -0,0 +1,16 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// Copyright 2024 by Wilson Snyder. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+// No include guards to validate if included once.
+
+`define VALUE_A 32'h12345678
+`define VALUE_B 32'h87654321
+
+typedef struct packed {
+    bit [31:0] PARAM_VALUE;
+} param_t;
diff --git a/test_regress/t/t_hier_block_import/t_hier_block_import_subA.v b/test_regress/t/t_hier_block_import/t_hier_block_import_subA.v
new file mode 100644
index 000000000..770b57f67
--- /dev/null
+++ b/test_regress/t/t_hier_block_import/t_hier_block_import_subA.v
@@ -0,0 +1,11 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// Copyright 2024 by Antmicro. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+module subA (output bit [31:0] out); /*verilator hier_block*/
+   subsub subsub(.out(out));
+endmodule
diff --git a/test_regress/t/t_hier_block_import/t_hier_block_import_subB.v b/test_regress/t/t_hier_block_import/t_hier_block_import_subB.v
new file mode 100644
index 000000000..3fb930bd8
--- /dev/null
+++ b/test_regress/t/t_hier_block_import/t_hier_block_import_subB.v
@@ -0,0 +1,12 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// Copyright 2024 by Antmicro. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+// Note: no hier_block pragma here to validate partial hier_block design
+module subB (output bit [31:0] out);
+   assign out = `VALUE_B;
+endmodule
diff --git a/test_regress/t/t_hier_block_import/t_hier_block_import_subsub.v b/test_regress/t/t_hier_block_import/t_hier_block_import_subsub.v
new file mode 100644
index 000000000..13d6d4014
--- /dev/null
+++ b/test_regress/t/t_hier_block_import/t_hier_block_import_subsub.v
@@ -0,0 +1,15 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// Copyright 2024 by Antmicro. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+module subsub
+#(
+   `include "t_hier_block_import.vh"
+)
+(output bit [31:0] out); /*verilator hier_block*/
+   assign out = pt.PARAM_VALUE;
+endmodule
diff --git a/test_regress/t/t_hier_block_import_cmake.py b/test_regress/t/t_hier_block_import_cmake.py
new file mode 100755
index 000000000..866eb3ff7
--- /dev/null
+++ b/test_regress/t/t_hier_block_import_cmake.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2024 by Wilson Snyder. This program is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+import vltest_bootstrap
+
+test.scenarios('vlt_all')
+# CMake build executes from a different directory than the Make one.
+test.top_filename = os.path.abspath("t/t_hier_block_import.v")
+
+# stats will be deleted but generation will be skipped if libs of hierarchical blocks exist.
+test.clean_objs()
+
+test.setenv('TEST_ROOT', test.t_dir + "/t_hier_block_import")
+
+test.compile(verilator_make_cmake=True,
+             verilator_make_gmake=False,
+             verilator_flags2=[
+                 '$TEST_ROOT/t_hier_block_import_def.vh',
+                 '-f $TEST_ROOT/t_hier_block_import_args.f', '-I$TEST_ROOT'
+             ],
+             threads=(6 if test.vltmt else 1))
+
+test.execute()
+
+test.file_grep(test.obj_dir + "/VsubA/subA.sv", r'^module\s+(\S+)\s+', "subA")
+test.file_grep(test.stats, r'HierBlock,\s+Hierarchical blocks\s+(\d+)', 2)
+
+test.passes()