diff --git a/pkgs/build-support/trivial-builders.nix b/pkgs/build-support/trivial-builders.nix
index c67f5845135b..3c81a4ece657 100644
--- a/pkgs/build-support/trivial-builders.nix
+++ b/pkgs/build-support/trivial-builders.nix
@@ -4,7 +4,8 @@ let
 
   runCommand' = runLocal: stdenv: name: env: buildCommand:
     stdenv.mkDerivation ({
-      inherit name buildCommand;
+      name = lib.strings.sanitizeDerivationName name;
+      inherit buildCommand;
       passAsFile = [ "buildCommand" ];
     }
     // (lib.optionalAttrs runLocal {