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-rw-r--r--nixos/modules/system/boot/stage-1.nix5
1 files changed, 5 insertions, 0 deletions
diff --git a/nixos/modules/system/boot/stage-1.nix b/nixos/modules/system/boot/stage-1.nix
index b2b66280372..7f7184b1e45 100644
--- a/nixos/modules/system/boot/stage-1.nix
+++ b/nixos/modules/system/boot/stage-1.nix
@@ -330,6 +330,11 @@ in
 
   config = {
 
+    assertions = singleton
+      { assertion = any (fs: fs.mountPoint == "/") (attrValues config.fileSystems);
+        message = "The ‘fileSystems’ option does not specify your root file system.";
+      };
+
     system.build.bootStage1 = bootStage1;
     system.build.initialRamdisk = initialRamdisk;
     system.build.extraUtils = extraUtils;