fix mic's priority

config.nix.diff

diff --git a/configuration.nix b/configuration.nix
index fdd9a99..9475b5c 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -22,6 +22,18 @@ let
     fi
   '';
   lib = pkgs.lib;
+
+  # the default priorities put the internal mic above headphones one
+  acp-paths = pkgs.runCommand "acp-paths" { } ''
+    mkdir -p $out
+    for f in ${pkgs.pipewire.lib}/share/alsa-card-profile/mixer/paths/*; do
+      ln -s $f $out/
+    done
+    cp --remove-destination "$(readlink "$out/analog-input-internal-mic.conf")" "$out/analog-input-internal-mic.conf"
+    cp --remove-destination "$(readlink "$out/analog-input-internal-mic-always.conf")" "$out/analog-input-internal-mic-always.conf"
+    sed -i 's/^priority = [0-9]*/priority = 79/' "$out/analog-input-internal-mic.conf"
+    sed -i 's/^priority = [0-9]*/priority = 79/' "$out/analog-input-internal-mic-always.conf"
+  '';
 in
 {
   imports =
@@ -102,6 +114,7 @@ in
       setSocketVariable = true;
     };
   };
+
   # Declarative containers
   programs.extra-container.enable = true;
@@ -273,6 +286,17 @@ in
   # Enable CUPS to print documents.
   services.printing.enable = true;
 
+  # Override paths for alsa-card-paths with one with my own priorities
+  systemd.user.services = {
+    pipewire-media-session.environment = {
+      ACP_PATHS_DIR = "${acp-paths}";
+    };
+
+    wireplumber.environment = {
+      ACP_PATHS_DIR = "${acp-paths}";
+    };
+  };
+
   hardware.bluetooth.enable = true;
 
   # Enable sound with pipewire.