diff --git a/nac3core/irrt/irrt.cpp b/nac3core/irrt/irrt.cpp
index f717bf3c..404681cc 100644
--- a/nac3core/irrt/irrt.cpp
+++ b/nac3core/irrt/irrt.cpp
@@ -1,6 +1,6 @@
-#include <irrt/exception.hpp>
-#include <irrt/int_types.hpp>
-#include <irrt/list.hpp>
-#include <irrt/math.hpp>
-#include <irrt/ndarray.hpp>
-#include <irrt/slice.hpp>
+#include "irrt/exception.hpp"
+#include "irrt/int_types.hpp"
+#include "irrt/list.hpp"
+#include "irrt/math.hpp"
+#include "irrt/ndarray.hpp"
+#include "irrt/slice.hpp"
diff --git a/nac3core/irrt/irrt/cslice.hpp b/nac3core/irrt/irrt/cslice.hpp
index 58712396..6f1d0a27 100644
--- a/nac3core/irrt/irrt/cslice.hpp
+++ b/nac3core/irrt/irrt/cslice.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <irrt/int_types.hpp>
+#include "irrt/int_types.hpp"
 
 template<typename SizeT>
 struct CSlice {
diff --git a/nac3core/irrt/irrt/exception.hpp b/nac3core/irrt/irrt/exception.hpp
index 4c1f0cb7..5b1ec590 100644
--- a/nac3core/irrt/irrt/exception.hpp
+++ b/nac3core/irrt/irrt/exception.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
-#include <irrt/cslice.hpp>
-#include <irrt/int_types.hpp>
+#include "irrt/cslice.hpp"
+#include "irrt/int_types.hpp"
 
 /**
  * @brief The int type of ARTIQ exception IDs.
diff --git a/nac3core/irrt/irrt/list.hpp b/nac3core/irrt/irrt/list.hpp
index 09841639..b389197f 100644
--- a/nac3core/irrt/irrt/list.hpp
+++ b/nac3core/irrt/irrt/list.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
-#include <irrt/int_types.hpp>
-#include <irrt/math_util.hpp>
+#include "irrt/int_types.hpp"
+#include "irrt/math_util.hpp"
 
 extern "C" {
 // Handle list assignment and dropping part of the list when
diff --git a/nac3core/irrt/irrt/ndarray.hpp b/nac3core/irrt/irrt/ndarray.hpp
index a946741b..5dda1739 100644
--- a/nac3core/irrt/irrt/ndarray.hpp
+++ b/nac3core/irrt/irrt/ndarray.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <irrt/int_types.hpp>
+#include "irrt/int_types.hpp"
 
 namespace {
 template<typename SizeT>
diff --git a/nac3core/irrt/irrt/slice.hpp b/nac3core/irrt/irrt/slice.hpp
index e2ce2d8c..a1523ddc 100644
--- a/nac3core/irrt/irrt/slice.hpp
+++ b/nac3core/irrt/irrt/slice.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <irrt/int_types.hpp>
+#include "irrt/int_types.hpp"
 
 extern "C" {
 SliceIndex __nac3_slice_index_bound(SliceIndex i, const SliceIndex len) {