diff --git a/pyproject.toml b/pyproject.toml
index 35d4949a531d2..3f1d005ad161a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -140,8 +140,18 @@ dependencies = [
   # First-party lifecycle and shared-metrics runtime. Relay 0.6 is the minimum
   # lossless provider-codec contract. Managed calls pass request/response data
   # through this native module in-process; shared metrics installs no network
-  # exporter and consumes only its bounded projection.
-  "nemo-relay>=0.6.0,<0.7; (sys_platform == 'darwin' and platform_machine == 'arm64') or (sys_platform == 'linux' and platform_machine == 'x86_64') or (sys_platform == 'linux' and platform_machine == 'aarch64') or (sys_platform == 'win32' and platform_machine == 'AMD64') or (sys_platform == 'win32' and platform_machine == 'ARM64')",
+  # exporter and consumes only its bounded projection. Relay publishes wheels
+  # only (no sdist), so this marker must stay false anywhere no wheel tag can
+  # match — otherwise `pip install hermes-agent` fails resolution outright
+  # instead of falling back to the no-op Relay host (#76469, Termux).
+  # Termux Python reports plain linux/aarch64 but runs on Bionic
+  # libc, which satisfies neither manylinux nor musllinux, hence the
+  # `'android' not in platform_release` guard on the linux arms: Android GKI
+  # kernels embed "-androidNN-" in the kernel release string. (Official PEP
+  # 738 CPython reports sys_platform == 'android' and never matched.) Pre-GKI
+  # devices can still slip through; they get the same resolution failure as
+  # before, worked around by installing with `--no-deps` or an older release.
+  "nemo-relay>=0.6.0,<0.7; (sys_platform == 'darwin' and platform_machine == 'arm64') or (sys_platform == 'linux' and platform_machine == 'x86_64' and 'android' not in platform_release) or (sys_platform == 'linux' and platform_machine == 'aarch64' and 'android' not in platform_release) or (sys_platform == 'win32' and platform_machine == 'AMD64') or (sys_platform == 'win32' and platform_machine == 'ARM64')",
 ]
 
 [project.optional-dependencies]