From 5e7d6d1214411d010403fa78c61e5da261ab9d80 Mon Sep 17 00:00:00 2001
From: Tobias Happ <tobias.happ@gmx.de>
Date: Fri, 18 Nov 2022 20:58:12 +0100
Subject: [PATCH] environment.path: fix installation with nix profile

Manual removal and installation as two non-atomical steps is required
because of https://github.com/NixOS/nix/issues/6349.
---
 modules/environment/path.nix | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/modules/environment/path.nix b/modules/environment/path.nix
index 6a8d80b..123fbb4 100644
--- a/modules/environment/path.nix
+++ b/modules/environment/path.nix
@@ -38,7 +38,19 @@ in
 
     build.activation.installPackages = ''
       if [[ -e "${config.user.home}/.nix-profile/manifest.json" ]]; then
-        $DRY_RUN_CMD nix profile install ${cfg.path}
+        # manual removal and installation as two non-atomical steps is required
+        # because of https://github.com/NixOS/nix/issues/6349
+
+        nix_previous="$(command -v nix)"
+
+        nix profile list \
+          | grep 'nix-on-droid-path$' \
+          | cut -d ' ' -f 4 \
+          | xargs -t $DRY_RUN_CMD nix profile remove $VERBOSE_ARG
+
+        $DRY_RUN_CMD $nix_previous profile install ${cfg.path}
+
+        unset nix_previous
       else
         $DRY_RUN_CMD nix-env --install ${cfg.path}
       fi