diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 0086a7a2..59fb1ad2 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -11,7 +11,12 @@ adheres to `Semantic Versioning <http://semver.org/spec/v2.0.0.html>`_.
 `Unreleased`_
 -------------
 
-Nothing yet
+Bugfix
+~~~~~~
+
+- Fixes a bug when plotting an anechoic room
+- Fixes a buggy assert from ``rir_build.cpp``
+- Makes the build system consistent for all source files in ``pyroomacoustics/libroom_src``
 
 `0.7.6`_ - 2024-08-05
 ---------------------
diff --git a/pyroomacoustics/libroom_src/rir_builder.cpp b/pyroomacoustics/libroom_src/rir_builder.cpp
index 36cf0821..a2300263 100644
--- a/pyroomacoustics/libroom_src/rir_builder.cpp
+++ b/pyroomacoustics/libroom_src/rir_builder.cpp
@@ -79,8 +79,6 @@ void threaded_rir_builder_impl(
   int max_sample = int(std::ceil(fs * t_max)) + fdl2;
   int min_sample = int(std::floor(fs * t_min)) - fdl2;
 
-  assert(min_samples >= 0);
-
   if (min_sample < 0)
     throw std::runtime_error("minimum time recorded is less than 0");
   if (max_sample >= int(rir_len))
diff --git a/pyroomacoustics/libroom_src/rir_builder.hpp b/pyroomacoustics/libroom_src/rir_builder.hpp
index f4802a4c..fe7f3557 100644
--- a/pyroomacoustics/libroom_src/rir_builder.hpp
+++ b/pyroomacoustics/libroom_src/rir_builder.hpp
@@ -17,4 +17,6 @@ void delay_sum(const py::buffer irs, const py::buffer delays, py::buffer output,
 void fractional_delay(py::buffer out, const py::buffer time, size_t lut_gran,
                       size_t num_threads);
 
+#include "rir_builder.cpp"
+
 #endif  // __RIR_BUILDER_HPP__
diff --git a/pyroomacoustics/room.py b/pyroomacoustics/room.py
index 4b8fd9a4..3a7c9f63 100644
--- a/pyroomacoustics/room.py
+++ b/pyroomacoustics/room.py
@@ -3153,12 +3153,12 @@ def get_bbox(self):
         upper = -np.inf * np.ones((self.dim,))
 
         if self.mic_array is not None:
-            lower = np.min(np.r_[lower[None, :], self.mic_array.R], axis=0)
-            upper = np.max(np.r_[upper[None, :], self.mic_array.R], axis=0)
+            lower = np.min(np.column_stack((lower, self.mic_array.R)), axis=1)
+            upper = np.max(np.column_stack((upper, self.mic_array.R)), axis=1)
 
         for i, source in enumerate(self.sources):
-            lower = np.min(np.r_[lower[None, :], source.position[None, :]], axis=0)
-            upper = np.max(np.c_[upper[None, :], source.position[None, :]], axis=0)
+            lower = np.min(np.row_stack((lower, source.position)), axis=0)
+            upper = np.max(np.row_stack((upper, source.position)), axis=0)
 
         return np.c_[lower, upper]
 
diff --git a/pyroomacoustics/tests/test_build_rir.py b/pyroomacoustics/tests/test_build_rir.py
index c28c7e14..81feb025 100644
--- a/pyroomacoustics/tests/test_build_rir.py
+++ b/pyroomacoustics/tests/test_build_rir.py
@@ -318,7 +318,7 @@ def measure_runtime(dtype=np.float32, num_threads=4):
 
     test_fractional_delay(np.float32, 2e-2)
     test_fractional_delay(np.float64, 2e-2)
-    test_delay_sum(np.float32, 1e-6)
+    test_delay_sum(np.float32, 1e-4)
 
     for t, a, v in zip(times, alphas, visibilities):
         ir_ref, ir_cython = build_rir_wrap(t, a, v, fs, fdl)
diff --git a/setup.py b/setup.py
index a91a0746..ece0b76b 100644
--- a/setup.py
+++ b/setup.py
@@ -60,7 +60,7 @@ def __str__(self):
 ext_modules = [
     Extension(
         "pyroomacoustics.libroom",
-        [os.path.join(libroom_src_dir, f) for f in ["libroom.cpp", "rir_builder.cpp"]],
+        [os.path.join(libroom_src_dir, f) for f in ["libroom.cpp"]],
         depends=libroom_files,
         include_dirs=[
             ".",