From 2fc50b7dbd3184b7ecfd0e607af816cb210b4ec2 Mon Sep 17 00:00:00 2001
From: Sandro <sandro.jaeckel@gmail.com>
Date: Mon, 23 Aug 2021 14:12:02 +0200
Subject: [PATCH] Only use nix-daemon when systemd is supported

---
 lib/install-nix.sh | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/install-nix.sh b/lib/install-nix.sh
index c424b02..c049fc0 100755
--- a/lib/install-nix.sh
+++ b/lib/install-nix.sh
@@ -21,12 +21,24 @@ fi
 
 # Nix installer flags
 installer_options=(
-  --daemon
-  --daemon-user-count 4
   --no-channel-add
   --darwin-use-unencrypted-nix-store-volume
   --nix-extra-conf-file /tmp/nix.conf
 )
+
+# only use the nix-daemon if systemd is supported
+if [[ -e /run/systemd/system ]]; then
+  installer_options+=(
+    --daemon
+    --daemon-user-count 4
+  )
+else
+  # "fix" the following error when running nix*
+  # error: the group 'nixbld' specified in 'build-users-group' does not exist
+  mkdir -m 0755 /etc/nix
+  echo "build-users-group =" > /etc/nix/nix.conf
+fi
+
 if [[ $INPUT_INSTALL_OPTIONS != "" ]]; then
   IFS=' ' read -r -a extra_installer_options <<< $INPUT_INSTALL_OPTIONS
   installer_options=("${extra_installer_options[@]}" "${installer_options[@]}")