diff --git a/pkgs/default.nix b/pkgs/default.nix
index 5616cfb..93acd84 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,20 +1,28 @@
 {
   pkgs,
-  texlab-src,
+  texlab-src ? null,
 }:
 let
-  self = {
-    example-a = pkgs.callPackage ./example-a { };
-    example-b = pkgs.callPackage ./example-b { };
-    pyzotero = pkgs.callPackage ./pyzotero { };
-    pyzotero-cli = pkgs.callPackage ./pyzotero-cli {
-      pyzotero = self.pyzotero;
-    };
-    khal-export = pkgs.callPackage ./khal-export { };
-    org-zotero-export = pkgs.callPackage ./org-zotero-export { };
-    texlab = pkgs.callPackage ./texlab {
-      inherit texlab-src;
-    };
-  };
+  self =
+    {
+      example-a = pkgs.callPackage ./example-a { };
+      example-b = pkgs.callPackage ./example-b { };
+      pyzotero = pkgs.callPackage ./pyzotero { };
+      pyzotero-cli = pkgs.callPackage ./pyzotero-cli {
+        pyzotero = self.pyzotero;
+      };
+      khal-export = pkgs.callPackage ./khal-export { };
+      org-zotero-export = pkgs.callPackage ./org-zotero-export { };
+    }
+    // (
+      if texlab-src != null then
+        {
+          texlab = pkgs.callPackage ./texlab {
+            inherit texlab-src;
+          };
+        }
+      else
+        { }
+    );
 in
 self // { default = self.example-a; }