diff --git a/README.md b/README.md
index d482637d..95b3cf18 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ C library.
 
 ```toml
 [dependencies]
-openkal-llvm-runtime = "0.20.0"
+openkal-llvm-runtime = "0.20.1"
 ```
 
 > **Engine floor (mcpp 2026.11.2.1):** 0.17.0 is built over openkal-musl 0.26.0,
@@ -330,6 +330,14 @@ grants against raw file truncation. The runtime implementation is unchanged.
 
 ## OpenKal 0.25 dependency group
 
+Runtime 0.20.1 builds for FreeBSD above openkal-musl (`x86_64-freebsd-musl`,
+`aarch64-freebsd-musl`): the selection of compiler-rt is Linux's and the ok
+image's, and `clear_cache.c` is kept, since nothing beneath a program of those
+rows supplies `__clear_cache`. The rows need openkal-musl 0.29.1, whose
+FreeBSD port offers `elf_aux_info`, which compiler-rt's aarch64 `cpu_model`
+calls there. The OpenKal conformance suite built so holds every observation in
+a FreeBSD virtual machine.
+
 Runtime 0.20.0 is built over openkal-musl `^0.29.0` and the OpenKal 0.25
 implementations beneath it (Linux 0.26, macOS 0.23, Windows 0.21, OpenSBI 0.9).
 The C++ runtime surface and the allocator selection are unchanged. Through the C
diff --git a/mcpp.toml b/mcpp.toml
index 134a1712..18d178ad 100644
--- a/mcpp.toml
+++ b/mcpp.toml
@@ -1,7 +1,7 @@
 [package]
 namespace   = "mcpplibs"
 name        = "openkal-llvm-runtime"
-version     = "0.20.0"
+version     = "0.20.1"
 description = "LLVM's C++ runtime libraries — libc++, libc++abi and libunwind — configured for openkal-musl rather than for a host C library."
 license     = "Apache-2.0"
 authors     = ["mcpplibs"]
@@ -511,6 +511,26 @@ sources = [
   "!llvm/libcxx/src/filesystem/int128_builtins.cpp",
 ]
 
+# FREEBSD ABOVE openkal-musl (`<arch>-freebsd-musl', 0.20.1) TAKES THE SAME
+# SELECTION AND KEEPS `clear_cache.c': nothing beneath a program of these rows
+# supplies `__clear_cache', which `__builtin___clear_cache' calls on aarch64 (a
+# program that writes code and runs it --- the conformance suite's `exec'
+# observations --- stopped at `undefined symbol: __clear_cache'), and the file is
+# the processor's own instructions there, with no call into the system.
+[target.'cfg(os = "freebsd")'.build]
+sources = [
+  "llvm/compiler-rt/lib/builtins/*.c",
+  "!llvm/compiler-rt/lib/builtins/atomic*.c",
+  "!llvm/compiler-rt/lib/builtins/emutls.c",
+  "!llvm/compiler-rt/lib/builtins/enable_execute_stack.c",
+  "!llvm/compiler-rt/lib/builtins/eprintf.c",
+  "!llvm/compiler-rt/lib/builtins/gcc_personality_v0.c",
+  "!llvm/compiler-rt/lib/builtins/crtbegin.c",
+  "!llvm/compiler-rt/lib/builtins/crtend.c",
+  "!llvm/compiler-rt/lib/builtins/os_version_check.c",
+  "!llvm/libcxx/src/filesystem/int128_builtins.cpp",
+]
+
 # THE x87 ROUTINES ARE AN ARCHITECTURE PROPERTY, AND THE BLOCK ABOVE SORTS
 # BY OPERATING SYSTEM.
 #
@@ -530,7 +550,7 @@ sources = [
 # today, so the exclusion looked like an OS property. It is not. Sorting on the
 # axis the fact actually lives on is what makes a second architecture work
 # without a third copy of the list.
-[target.'cfg(all(any(os = "linux", os = "openkal"), not(arch = "x86_64")))'.build]
+[target.'cfg(all(any(os = "linux", os = "openkal", os = "freebsd"), not(arch = "x86_64")))'.build]
 sources = [
   "!llvm/compiler-rt/lib/builtins/*xf*.c",
   "!llvm/compiler-rt/lib/builtins/*xc3.c",