krebs/populate.nix -> krebs/v2 populate

Makefile

@@ -33,15 +33,20 @@ deploy2: export target-host = $(target)
 else
 deploy2: export target-host = $(system)
 endif
+deploy2: export source = \
+	with (import ~/stockholm {}).users.$(LOGNAME).$(system).config.krebs.build; \
+	assert source-version == 2; \
+	source
 deploy2:;@
 	target=$${target-$$system}
 	result=$$(nix-instantiate \
-			--json \
 			--eval \
-			krebs/populate.nix \
-			--arg source 'with (import ~/stockholm {}).users.$(LOGNAME).$(system).config.krebs.build; assert source-version == 2; source' \
+			--json \
+			--arg source "$$source" \
 			--argstr target-host "$$target" \
-			--argstr target-path /var/src)
+			--argstr target-path /var/src \
+			-A populate \
+			krebs/v2)
 	script=$$(echo "$$result" | jq -r .)
 	echo "$$script" | sh
 	ssh root@$$target nixos-rebuild switch -I /var/src

krebs/v2/default.nix

@@ -9,7 +9,11 @@ with import ~/stockholm/krebs/4lib {
 };
 with builtins;
 let
-  out = ''
+  out = {
+    inherit populate;
+  };
+
+  populate = ''
     #! /bin/sh
     set -efu