diff --git a/krebs/3modules/build.nix b/krebs/3modules/build.nix
index 1205e192b..7f004cd81 100644
--- a/krebs/3modules/build.nix
+++ b/krebs/3modules/build.nix
@@ -29,10 +29,13 @@ let
     };
 
     options.krebs.build.source.dir = mkOption {
-      type = types.attrsOf (types.submodule ({ config, ... }: {
+      type = let
+        default-host = config.krebs.current.host;
+      in types.attrsOf (types.submodule ({ config, ... }: {
         options = {
           host = mkOption {
             type = types.host;
+            default = default-host;
           };
           path = mkOption {
             type = types.str;
diff --git a/tv/1systems/cd.nix b/tv/1systems/cd.nix
index 3f496fefb..126c6feb5 100644
--- a/tv/1systems/cd.nix
+++ b/tv/1systems/cd.nix
@@ -14,11 +14,9 @@ with lib;
       rev = "c44a593aa43bba6a0708f6f36065a514a5110613";
     };
     dir.secrets = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/secrets/cd";
     };
     dir.stockholm = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/stockholm";
     };
   };
diff --git a/tv/1systems/mkdir.nix b/tv/1systems/mkdir.nix
index 64896daf4..55d83f8f3 100644
--- a/tv/1systems/mkdir.nix
+++ b/tv/1systems/mkdir.nix
@@ -27,11 +27,9 @@ in
       rev = "c44a593aa43bba6a0708f6f36065a514a5110613";
     };
     dir.secrets = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/secrets/mkdir";
     };
     dir.stockholm = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/stockholm";
     };
   };
diff --git a/tv/1systems/nomic.nix b/tv/1systems/nomic.nix
index 495c765f3..c2bb4dc78 100644
--- a/tv/1systems/nomic.nix
+++ b/tv/1systems/nomic.nix
@@ -14,11 +14,9 @@ with lib;
       rev = "c44a593aa43bba6a0708f6f36065a514a5110613";
     };
     dir.secrets = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/secrets/nomic";
     };
     dir.stockholm = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/stockholm";
     };
   };
diff --git a/tv/1systems/rmdir.nix b/tv/1systems/rmdir.nix
index 62340b88c..53f14d7df 100644
--- a/tv/1systems/rmdir.nix
+++ b/tv/1systems/rmdir.nix
@@ -27,11 +27,9 @@ in
       rev = "c44a593aa43bba6a0708f6f36065a514a5110613";
     };
     dir.secrets = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/secrets/rmdir";
     };
     dir.stockholm = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/stockholm";
     };
   };
diff --git a/tv/1systems/wu.nix b/tv/1systems/wu.nix
index 8f714ec6b..33292c608 100644
--- a/tv/1systems/wu.nix
+++ b/tv/1systems/wu.nix
@@ -15,11 +15,9 @@ with lib;
       target-path = "/var/src/nixpkgs";
     };
     dir.secrets = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/secrets/wu";
     };
     dir.stockholm = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/stockholm";
       target-path = "/var/src/stockholm";
     };
diff --git a/tv/1systems/xu.nix b/tv/1systems/xu.nix
index 6f673ce9c..607f89aea 100644
--- a/tv/1systems/xu.nix
+++ b/tv/1systems/xu.nix
@@ -14,11 +14,9 @@ with lib;
       rev = "c44a593aa43bba6a0708f6f36065a514a5110613";
     };
     dir.secrets = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/secrets/xu";
     };
     dir.stockholm = {
-      host = config.krebs.hosts.wu;
       path = "/home/tv/stockholm";
     };
   };