diff --git a/jobsets.nix b/jobsets.nix
index b72d356..bab86e4 100644
--- a/jobsets.nix
+++ b/jobsets.nix
@@ -1,123 +1,62 @@
 { pkgs ? import <nixpkgs> {} }:
 let
+  mkJobset = { description, nixexprpath, gitUrls }: {
+    inherit description nixexprpath;
+    enabled = 1;
+    hidden = false;
+    nixexprinput = "hydra-config";
+    checkinterval = 300;
+    schedulingshares = 100;
+    enableemail = true;
+    keepnr = 16;
+    inputs = {
+      hydra-config = {
+        type = "git";
+        value = "https://gitea.c3d2.de/C3D2/hydra-config.git master 1";
+        emailresponsible = false;
+      };
+      nixpkgs = {
+        type = "git";
+        value = "git://github.com/NixOS/nixpkgs.git release-19.09 1";
+        emailresponsible = false;
+      };
+    } // (builtins.mapAttrs (_: gitUrl: {
+      type = "git";
+      value = gitUrl;
+      emailresponsible = false;
+    }) gitUrls);
+  };
   jobsets = {
-    spacemsg = {
-      enabled = 1;
-      hidden = false;
+    # TODO: pile, host tests
+    spacemsg = mkJobset {
       description = "Astro's HQ IoT stuff";
-      nixexprinput = "hydra-config";
       nixexprpath = "spacemsg.nix";
-      checkinterval = 300;
-      schedulingshares = 100;
-      enableemail = true;
-      emailoverride = "astro@spaceboyz.net";
-      keepnr = 3;
-      inputs = {
-        spacemsg = {
-          type = "git";
-          value = "https://github.com/astro/spacemsg.git master 1";
-          emailresponsible = false;
-        };
-        hydra-config = {
-          type = "git";
-          value = "https://gitea.c3d2.de/C3D2/hydra-config.git master 1";
-          emailresponsible = false;
-        };
-        nixpkgs = {
-          type = "git";
-          value = "git://github.com/NixOS/nixpkgs.git release-19.09 1";
-          emailresponsible = false;
-        };
+      gitUrls = {
+        spacemsg = "https://github.com/astro/spacemsg.git master 1";
       };
     };
 
-    yammat = {
-      enabled = 1;
-      hidden = false;
+    yammat = mkJobset {
       description = "Matemat by nek0";
-      nixexprinput = "hydra-config";
       nixexprpath = "yammat.nix";
-      checkinterval = 300;
-      schedulingshares = 100;
-      enableemail = true;
-      emailoverride = "nek0@nek0.eu";
-      keepnr = 3;
-      inputs = {
-        yammat = {
-          type = "git";
-          value = "https://github.com/nek0/yammat.git master 1";
-          emailresponsible = false;
-        };
-        hydra-config = {
-          type = "git";
-          value = "https://gitea.c3d2.de/C3D2/hydra-config.git master 1";
-          emailresponsible = false;
-        };
-        nixpkgs = {
-          type = "git";
-          value = "git://github.com/NixOS/nixpkgs.git release-19.09 1";
-          emailresponsible = false;
-        };
+      gitUrls = {
+        yammat = "https://github.com/nek0/yammat.git master 1";
       };
     };
 
-    tigger = {
-      enabled = 1;
-      hidden = false;
+    tigger = mkJobset {
       description = "XMPP MUC bot";
-      nixexprinput = "hydra-config";
       nixexprpath = "tigger.nix";
-      checkinterval = 300;
-      schedulingshares = 100;
-      enableemail = true;
-      emailoverride = "astro@spaceboyz.net";
-      keepnr = 3;
-      inputs = {
-        tigger = {
-          type = "git";
-          value = "https://github.com/astro/tigger.git master 1";
-          emailresponsible = false;
-        };
-        hydra-config = {
-          type = "git";
-          value = "https://gitea.c3d2.de/C3D2/hydra-config.git master 1";
-          emailresponsible = false;
-        };
-        nixpkgs = {
-          type = "git";
-          value = "git://github.com/NixOS/nixpkgs.git release-19.09 1";
-          emailresponsible = false;
-        };
+      gitUrls = {
+        tigger = "https://github.com/astro/tigger.git master 1";
       };
     };
 
     slidenado = {
-      enabled = 1;
-      hidden = false;
       description = "CmS slide generator";
-      nixexprinput = "hydra-config";
       nixexprpath = "slidenado.nix";
-      checkinterval = 300;
-      schedulingshares = 100;
-      enableemail = true;
-      emailoverride = "astro@spaceboyz.net";
-      keepnr = 3;
-      inputs = {
-        slidenado = {
-          type = "git";
-          value = "https://github.com/c3d2/slidenado.git master 1";
-          emailresponsible = false;
-        };
-        hydra-config = {
-          type = "git";
-          value = "https://gitea.c3d2.de/C3D2/hydra-config.git master 1";
-          emailresponsible = false;
-        };
-        nixpkgs = {
-          type = "git";
-          value = "git://github.com/NixOS/nixpkgs.git release-19.09 1";
-          emailresponsible = false;
-        };
+      gitUrls = {
+        slidenado = "https://github.com/c3d2/slidenado.git master 1";
       };
     };