From 8c3878f117b1e30f3eb97d95f1095fb74ce634d9 Mon Sep 17 00:00:00 2001
From: Val Packett <val@invisiblethingslab.com>
Date: Fri, 13 Feb 2026 14:55:52 -0300
Subject: [PATCH] Pass timezone through to the VM
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What a way to discover that this was missing- PipeWire camera was
freezing unless something on the host was already streaming it…

gstclock.c:1086:gst_clock_get_internal_time:<pipewireclock0> internal time 1:01:04.622699903
gstclock.c:1129:gst_clock_get_time:<pipewireclock0> adjusted time 5123776:20:12.866176008

Well, that wasn't even caused by the TZ but it made me think to fix it..

NOTE for local dev, rebuild micro-activate now
---
 micro-activate.rs        | 2 ++
 munix                    | 4 +++-
 nixosModules/default.nix | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/micro-activate.rs b/micro-activate.rs
index d9d829c..0806e96 100644
--- a/micro-activate.rs
+++ b/micro-activate.rs
@@ -71,6 +71,7 @@ fn main() -> Result<(), std::io::Error> {
     //
     // Let's preserve the fixed passed-in files and set up the NixOS symlinks in the new mount.
     let resolv_conf = std::fs::read("/run/resolv.conf")?;
+    let localtime = std::fs::read("/run/localtime")?;
     assert_eq!(
         unsafe {
             mount(
@@ -83,6 +84,7 @@ fn main() -> Result<(), std::io::Error> {
         },
         0
     );
+    std::fs::write("/run/localtime", &localtime)?;
     std::fs::write("/run/resolv.conf", &resolv_conf)?;
     std::fs::write("/run/machine-id", &gen_machine_id())?;
     std::os::unix::fs::symlink(&closure, "/run/current-system")?;
diff --git a/munix b/munix
index 9c67084..89d79c3 100755
--- a/munix
+++ b/munix
@@ -223,6 +223,7 @@ bwrap --unshare-all --share-net \
   --symlink "$MICROVM_CLOSURE" /run/current-system \
   --ro-bind /nix/store /nix/store \
   --file 13 /run/resolv.conf \
+  --file 14 /run/localtime \
   --dir "$XDG_RUNTIME_DIR" \
   --setenv PATH "/run/munix/muvm:/run/munix/passt:$MICROVM_CLOSURE/sw/bin" \
   "${BWRAP_ARGS[@]}" \
@@ -233,4 +234,5 @@ bwrap --unshare-all --share-net \
     -e MICROVM_CLOSURE="$MICROVM_CLOSURE" \
     -e MICROVM_UID="$MICROVM_UID" -e MICROVM_GID="$MICROVM_GID" \
     -i -t -- "${MICROVM_COMMAND[@]}" \
-  13< /etc/resolv.conf
+  13< /etc/resolv.conf \
+  14< /etc/localtime
diff --git a/nixosModules/default.nix b/nixosModules/default.nix
index 3b229dd..15a5a08 100644
--- a/nixosModules/default.nix
+++ b/nixosModules/default.nix
@@ -64,6 +64,7 @@ in
     services.resolved.enable = false;
     environment.etc."resolv.conf".source = "/run/resolv.conf";
     environment.etc."machine-id".source = "/run/machine-id";
+    environment.etc."localtime".source = "/run/localtime";
     environment.etc."systemd/system".source = lib.mkForce (
       utils.systemdUtils.lib.generateUnits {
         type = "system";