diff --git a/pkgs/development/tools/analysis/binlore/default.nix b/pkgs/development/tools/analysis/binlore/default.nix
index e6d529b0684a..54ea108b7d46 100644
--- a/pkgs/development/tools/analysis/binlore/default.nix
+++ b/pkgs/development/tools/analysis/binlore/default.nix
@@ -45,11 +45,11 @@ let
   # TODO: feeling really uninspired on the API
   loreDef = {
     # YARA rule file
-    rules = (src + /execers.yar);
+    rules = (src + "/execers.yar");
     # output filenames; "types" of lore
     types = [ "execers" "wrappers" ];
     # shell rule callbacks; see github.com/abathur/yallback
-    yallback = (src + /execers.yall);
+    yallback = (src + "/execers.yall");
     # TODO:
     # - echo for debug, can be removed at some point
     # - I really just wanted to put the bit after the pipe
@@ -88,7 +88,7 @@ let
       fi
     '';
   };
-  overrides = (src + /overrides);
+  overrides = (src + "/overrides");
 
 in rec {
   collect = { lore ? loreDef, drvs, strip ? [ ] }: (runCommand "more-binlore" { } ''