diff --git a/nixosModules/clanCore/facts/default.nix b/nixosModules/clanCore/facts/default.nix
index 51a44a48..841eeb90 100644
--- a/nixosModules/clanCore/facts/default.nix
+++ b/nixosModules/clanCore/facts/default.nix
@@ -123,13 +123,23 @@
 
                         # prepare sandbox user
                         mkdir -p /etc
-                        cp ${
-                          pkgs.runCommand "fake-etc" { } ''
-                            export PATH="${pkgs.coreutils}/bin"
-                            mkdir -p $out
-                            cp /etc/* $out/
-                          ''
-                        }/* /etc/
+
+                        cat > /etc/group <<EOF
+                        root:x:0:
+                        nixbld:!:$(id -g):
+                        nogroup:x:65534:
+                        EOF
+
+                        cat > /etc/passwd <<EOF
+                        root:x:0:0:Nix build user:/build:/noshell
+                        nixbld:x:$(id -u):$(id -g):Nix build user:/build:/noshell
+                        nobody:x:65534:65534:Nobody:/:/noshell
+                        EOF
+
+                        cat > /etc/hosts <<EOF
+                        127.0.0.1 localhost
+                        ::1 localhost
+                        EOF
 
                         ${config.script}
                       '';