diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## 0.1.1.0 - 2021-04-21
+
+### Added
+
+ - Functions for retrieving the Nix daemon protocol versions
+ - Functions for interacting with the interrupt handler
+
 ## 0.1.0.0 - 2021-03-05
 
 ### Added
diff --git a/hercules-ci-cnix-store.cabal b/hercules-ci-cnix-store.cabal
--- a/hercules-ci-cnix-store.cabal
+++ b/hercules-ci-cnix-store.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.4
 
 name:           hercules-ci-cnix-store
-version:        0.1.0.0
+version:        0.1.1.0
 synopsis:       Haskell bindings for Nix's libstore
 category:       Nix
 homepage:       https://docs.hercules-ci.com
@@ -44,6 +44,7 @@
   import: cxx-opts
   exposed-modules:
       Hercules.CNix
+      Hercules.CNix.Util
       Hercules.CNix.Store.Context
       Hercules.CNix.Store
   include-dirs:
diff --git a/src/Hercules/CNix/Store.hs b/src/Hercules/CNix/Store.hs
--- a/src/Hercules/CNix/Store.hs
+++ b/src/Hercules/CNix/Store.hs
@@ -55,6 +55,8 @@
 
 C.include "<nix/globals.hh>"
 
+C.include "<nix/worker-protocol.hh>"
+
 C.include "hercules-ci-cnix/store.hxx"
 
 C.using "namespace nix"
@@ -106,6 +108,21 @@
     [C.block| const char* {
        std::string uri = (*$(refStore* store))->getUri();
        return strdup(uri.c_str());
+     } |]
+
+getStoreProtocolVersion :: Store -> IO Int
+getStoreProtocolVersion (Store store) =
+  fromIntegral
+    <$> [C.throwBlock| int {
+       Store &store = **$(refStore* store);
+       return store.getProtocol();
+     } |]
+
+getClientProtocolVersion :: IO Int
+getClientProtocolVersion =
+  fromIntegral
+    <$> [C.throwBlock| int {
+       return PROTOCOL_VERSION;
      } |]
 
 ensurePath :: Store -> ByteString -> IO ()
diff --git a/src/Hercules/CNix/Util.hs b/src/Hercules/CNix/Util.hs
new file mode 100644
--- /dev/null
+++ b/src/Hercules/CNix/Util.hs
@@ -0,0 +1,41 @@
+{-# LANGUAGE BlockArguments #-}
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+-- | Functions calling Nix's libutil
+module Hercules.CNix.Util
+  ( setInterruptThrown,
+    triggerInterrupt,
+  )
+where
+
+import Hercules.CNix.Store.Context
+  ( context,
+  )
+import qualified Language.C.Inline.Cpp as C
+import qualified Language.C.Inline.Cpp.Exceptions as C
+import Protolude
+import Prelude ()
+
+C.context context
+
+C.include "<nix/config.h>"
+
+C.include "<nix/affinity.hh>"
+
+C.include "<nix/util.hh>"
+
+C.using "namespace nix"
+
+setInterruptThrown :: IO ()
+setInterruptThrown =
+  [C.throwBlock| void {
+    nix::setInterruptThrown();
+  } |]
+
+triggerInterrupt :: IO ()
+triggerInterrupt =
+  [C.throwBlock| void {
+    nix::triggerInterrupt();
+  } |]