diff --git a/Provide-native-lib-for-libsignal.md b/Provide-native-lib-for-libsignal.md
index d0f6d30..a775650 100644
--- a/Provide-native-lib-for-libsignal.md
+++ b/Provide-native-lib-for-libsignal.md
@@ -10,8 +10,8 @@ Builds for some additional platforms are available in
 
 * https://github.com/exquo/signal-libs-build/
   * **Linux:**
-    * amd64/x86_64, arm64/aarch64, armv7, i386 _(these require `glibc` v2.29 or newer)_
-    * amd64/x86_64 _(this requires musl libc)_
+    * amd64/x86_64 _(variant 1 requires `glibc` v2.28 or newer, variant 2 requires `musl libc`)_
+    * arm64/aarch64, armv7, i386 _(these require `glibc` v2.29 or newer)_
   * **macOS:** amd64/x86_64, arm64/aarch64 _(these require Darwin v14)_
   * **Windows:** amd64/x86_64
 * https://gitlab.com/packaging/libsignal-client/
@@ -25,6 +25,7 @@ Builds for some additional platforms are available in
     * `libsignal_jni_soNNNN_ubuntu1804_{amd64,i686,arm64,armv7,mips64el,mipsel,s390x,sparc64}.gz` _(these require `glibc` v2.25 or newer)_
     * `libsignal_jni_soNNNN_ubuntu1604_{ppc64,ppc64el}.gz` _(these require `glibc` v2.22 or newer)_
     * `libsignal_jni_soNNNN_ubuntu1604_{amd64,i686,arm64,armv7,mips64el,mipsel,powerpc,s390x,sparc64}.gz` _(these require `glibc` v2.18 or newer)_
+  * **WARNING:** Current test builds contain references to `glibc` functions only available from v2.28, v2.25, respectively; depending on your use case(s), this might lead to errors (_work-in-progress_)
 
 ## Manual build