diff --git a/README.md b/README.md
index 981d6c18..1a444e5e 100644
--- a/README.md
+++ b/README.md
@@ -555,9 +555,9 @@ Of course, in addition to this, your toolchain must ensure the reproducibility o
 For more information please refer to [reproducible-builds.org](https://reproducible-builds.org/).
 
 #### Containers
-There are no special traits nor quirks if you use libmdbx ONLY inside the single container.
-But in a cross-container cases or with a host-container(s) mix the two major things MUST be
-guaranteed:
+There are no special traits nor quirks if you use _libmdbx_ ONLY inside
+the single container. But in a cross-container(s) or with a host-container(s)
+interoperability cases the three major things MUST be guaranteed:
 
 1. Coherence of memory mapping content and unified page cache inside OS
 kernel for host and all container(s) operated with a DB. Basically this
@@ -573,6 +573,12 @@ in the system memory.
       including `ERROR_ACCESS_DENIED`,
       but not the `ERROR_INVALID_PARAMETER` as for an invalid/non-existent PID.
 
+3. The versions/builds of _libmdbx_ and `libc`/`pthreads` (`glibc`, `musl`, etc) must be be compatible.
+   - Basically, the `options:` string in the output of `mdbx_chk -V` must be the same for host and container(s).
+     See `MDBX_LOCKING`, `MDBX_USE_OFDLOCKS` and other build options for details.
+   - Avoid using different versions of `libc`, especially mixing different implementations, i.e. `glibc` with `musl`, etc.
+     Prefer to use the same LTS version, or switch to full virtualization/isolation if in doubt.
+
 #### DSO/DLL unloading and destructors of Thread-Local-Storage objects
 When building _libmdbx_ as a shared library or use static _libmdbx_ as a
 part of another dynamic library, it is advisable to make sure that your
diff --git a/src/lck-posix.c b/src/lck-posix.c
index 99a01f91..1fb502a1 100644
--- a/src/lck-posix.c
+++ b/src/lck-posix.c
@@ -49,7 +49,7 @@
  *   = F_WRLCK блокировка первого байта lck-файла, другие процессы ждут её
  *     снятия при получении F_RDLCK через F_SETLKW.
  *   - блокировки dxb-файла могут меняться до снятие эксклюзивной блокировки
- *    lck-файла:
+ *     lck-файла:
  *       + для НЕ-эксклюзивного режима блокировка pid-байта в dxb-файле
  *         посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY.
  *       + для ЭКСКЛЮЗИВНОГО режима блокировка всего dxb-файла