diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 59483c4..51bc22a 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: install dependencies
-        run: sudo apt-get update && sudo apt-get -y install cmake libopencv-dev libspdlog-dev libargparse-dev libcpp-httplib-dev
+        run: sudo apt-get -y install cmake libopencv-dev libspdlog-dev libargparse-dev
       - uses: actions/cache@v4
         with:
           path: build
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 50c8312..82bf47a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,29 +28,39 @@ find_package(spdlog REQUIRED)
 find_package(Catch2 REQUIRED)
 
 # httplib
-find_package(httplib REQUIRED)
+find_package(httplib QUIET)
 
 # init all executables
-foreach(exe Sender Receiver SenderWeb)
-add_executable(${exe} src/${exe}.cpp ${PROJECT_IMPLEMENTATIONS})
-
-# Linking
-target_link_libraries(${exe}
-    ${OpenCV_LIBS}
-    argparse::argparse
-    spdlog::spdlog
-    httplib::httplib
-)
+foreach(exe Sender Receiver)
+    add_executable(${exe} src/${exe}.cpp ${PROJECT_IMPLEMENTATIONS})
+    
+    # Linking
+    target_link_libraries(${exe}
+        ${OpenCV_LIBS}
+        argparse::argparse
+        spdlog::spdlog
+    )
 endforeach()
 
+# optionally compile the UI
+if (httplib_FOUND)
+    add_executable(SenderWeb src/SenderWeb.cpp ${PROJECT_IMPLEMENTATIONS})
+    target_link_libraries(SenderWeb
+        ${OpenCV_LIBS}
+        argparse::argparse
+        spdlog::spdlog
+        httplib::httplib
+    )
+endif()
+
 # Tests
 enable_testing()
 foreach(test ffmpeg utils hyperwall settings)
-add_executable(test_${test} src/test/${test}.cpp ${PROJECT_IMPLEMENTATIONS})
-target_link_libraries(test_${test}
-    ${OpenCV_LIBS}
-    spdlog::spdlog
-    Catch2::Catch2WithMain
-)
-add_test(NAME ${test} COMMAND test_${test})
+    add_executable(test_${test} src/test/${test}.cpp ${PROJECT_IMPLEMENTATIONS})
+    target_link_libraries(test_${test}
+        ${OpenCV_LIBS}
+        spdlog::spdlog
+        Catch2::Catch2WithMain
+    )
+    add_test(NAME ${test} COMMAND test_${test})
 endforeach()
diff --git a/flake.nix b/flake.nix
index 8bb791c..f0fe32b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,6 +20,8 @@
                     argparse
                     catch2_3
                     httplib
+                    gcc
+                    openssl
                 ];
             };
         }) {