diff --git a/ChangeLog b/ChangeLog
index 2c2ea7beb..4b3c48b6f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,7 @@ Enhancements:
 - #7464 Restore `--only-python` arg to only install Python deps
 - #7465 Also cut `+` char for `SHORT_VERSION` var used on upload
 - #7467 Load server or client args from `synergy-config.toml`
+- #7469 Option to link against local `libportal` and other subprojects
 
 # 1.15.1
 
diff --git a/cmake/Libraries.cmake b/cmake/Libraries.cmake
index 4c0a0b5a3..8cd9359c4 100644
--- a/cmake/Libraries.cmake
+++ b/cmake/Libraries.cmake
@@ -38,6 +38,7 @@ macro(configure_unix_libs)
   include(CheckIncludeFileCXX)
   include(CheckSymbolExists)
   include(CheckCSourceCompiles)
+  include(FindPkgConfig)
 
   check_include_file_cxx(istream HAVE_ISTREAM)
   check_include_file_cxx(ostream HAVE_OSTREAM)
@@ -167,32 +168,8 @@ endmacro()
 
 macro(configure_wayland_libs)
 
-  include(FindPkgConfig)
-
-  pkg_check_modules(LIBEI QUIET "libei-1.0 >= ${LIBEI_MIN_VERSION}")
-  if(LIBEI_FOUND)
-    message(STATUS "libei version: ${LIBEI_VERSION}")
-    add_definitions(-DWINAPI_LIBEI=1)
-    include_directories(${LIBEI_INCLUDE_DIRS})
-  else()
-    message(
-      WARNING
-        "libei >= ${LIBEI_MIN_VERSION} not found, Wayland support will be disabled."
-    )
-  endif()
-
-  pkg_check_modules(LIBPORTAL QUIET "libportal >= ${LIBPORTAL_MIN_VERSION}")
-  if(LIBPORTAL_FOUND)
-    message(STATUS "libportal version: ${LIBPORTAL_VERSION}")
-    add_definitions(-DWINAPI_LIBPORTAL=1)
-    include_directories(${LIBPORTAL_INCLUDE_DIRS})
-    check_libportal()
-  else()
-    message(
-      WARNING
-        "libportal >= ${LIBPORTAL_MIN_VERSION} not found, some Wayland features will be disabled."
-    )
-  endif()
+  configure_libei()
+  configure_libportal()
 
   pkg_check_modules(LIBXKBCOMMON REQUIRED xkbcommon)
   pkg_check_modules(GLIB2 REQUIRED glib-2.0 gio-2.0)
@@ -202,23 +179,103 @@ macro(configure_wayland_libs)
 
 endmacro()
 
+macro(configure_libei)
+  option(SYSTEM_LIBEI "Use system libei" ON)
+  if(SYSTEM_LIBEI)
+    pkg_check_modules(LIBEI QUIET "libei-1.0 >= ${LIBEI_MIN_VERSION}")
+    if(LIBEI_FOUND)
+      message(STATUS "libei version: ${LIBEI_VERSION}")
+      add_definitions(-DWINAPI_LIBEI=1)
+      include_directories(${LIBEI_INCLUDE_DIRS})
+    else()
+      message(WARNING "libei >= ${LIBEI_MIN_VERSION} not found")
+    endif()
+  else()
+    set(libei_bin_dir ${CMAKE_BINARY_DIR}/meson/subprojects/libei/src)
+    set(libei_src_dir ${CMAKE_SOURCE_DIR}/subprojects/libei)
+    find_library(
+      LIBEI_LINK_LIBRARIES
+      NAMES ei
+      PATHS ${libei_bin_dir}
+      NO_DEFAULT_PATH)
+    if(LIBEI_LINK_LIBRARIES)
+      message(STATUS "Using local subproject libei")
+      set(LIBEI_FOUND true)
+      add_definitions(-DWINAPI_LIBEI=1)
+      set(LIBEI_INCLUDE_DIRS ${libei_src_dir}/src)
+      include_directories(${LIBEI_INCLUDE_DIRS})
+    else()
+      message(WARNING "Local libei not found")
+    endif()
+  endif()
+endmacro()
+
+macro(configure_libportal)
+  option(SYSTEM_LIBPORTAL "Use system libportal" ON)
+  if(SYSTEM_LIBPORTAL)
+    pkg_check_modules(LIBPORTAL QUIET "libportal >= ${LIBPORTAL_MIN_VERSION}")
+    if(LIBPORTAL_FOUND)
+      message(STATUS "libportal version: ${LIBPORTAL_VERSION}")
+      check_libportal()
+    else()
+      message(WARNING "libportal >= ${LIBPORTAL_MIN_VERSION} not found")
+    endif()
+  else()
+    set(libportal_bin_dir
+        ${CMAKE_BINARY_DIR}/meson/subprojects/libportal/libportal)
+    set(libportal_src_dir ${CMAKE_SOURCE_DIR}/subprojects/libportal)
+    find_library(
+      LIBPORTAL_LINK_LIBRARIES
+      NAMES portal
+      PATHS ${libportal_bin_dir}
+      NO_DEFAULT_PATH)
+
+    if(LIBPORTAL_LINK_LIBRARIES)
+      message(STATUS "Using local subproject libportal")
+      set(LIBPORTAL_FOUND true)
+      set(LIBPORTAL_INCLUDE_DIRS ${libportal_src_dir})
+
+      # HACK: Somehow `check_symbol_exists` doesn't pick up on the symbols even though
+      # they are actually there. Since we use master branch of libportal, for now we'll
+      # assume that the symbols are there.
+      set(HAVE_LIBPORTAL_SESSION_CONNECT_TO_EIS true)
+      set(HAVE_LIBPORTAL_CREATE_REMOTE_DESKTOP_SESSION_FULL true)
+      set(HAVE_LIBPORTAL_INPUTCAPTURE true)
+      set(HAVE_LIBPORTAL_OUTPUT_NONE true)
+    else()
+      message(WARNING "Local libportal not found")
+    endif()
+  endif()
+
+  if(LIBPORTAL_FOUND)
+    add_definitions(-DWINAPI_LIBPORTAL=1)
+    include_directories(${LIBPORTAL_INCLUDE_DIRS})
+  endif()
+
+endmacro()
+
+# libportal 0.7 has xdp_session_connect_to_eis but it doesn't have remote desktop session restore or
+# the inputcapture code, so let's check for explicit functions that bits depending on what we have
 macro(check_libportal)
-  # libportal 0.7 has xdp_session_connect_to_eis but it doesn't have remote desktop session restore or
-  # the inputcapture code, so let's check for explicit functions that bits depending on what we have
   include(CMakePushCheckState)
   include(CheckCXXSourceCompiles)
+
   cmake_push_check_state(RESET)
+
   set(CMAKE_REQUIRED_INCLUDES
       "${CMAKE_REQUIRED_INCLUDES};${LIBPORTAL_INCLUDE_DIRS};${GLIB2_INCLUDE_DIRS}"
   )
   set(CMAKE_REQUIRED_LIBRARIES
       "${CMAKE_REQUIRED_LIBRARIES};${LIBPORTAL_LINK_LIBRARIES};${GLIB2_LINK_LIBRARIES}"
   )
+
   check_symbol_exists(xdp_session_connect_to_eis "libportal/portal.h"
                       HAVE_LIBPORTAL_SESSION_CONNECT_TO_EIS)
+
   check_symbol_exists(
     xdp_portal_create_remote_desktop_session_full "libportal/portal.h"
     HAVE_LIBPORTAL_CREATE_REMOTE_DESKTOP_SESSION_FULL)
+
   check_symbol_exists(xdp_input_capture_session_connect_to_eis
                       "libportal/inputcapture.h" HAVE_LIBPORTAL_INPUTCAPTURE)
 
@@ -227,8 +284,25 @@ macro(check_libportal)
     "#include <libportal/portal.h>
         int main() { XdpOutputType out = XDP_OUTPUT_NONE; }
     " HAVE_LIBPORTAL_OUTPUT_NONE)
+
   cmake_pop_check_state()
 
+  if(NOT HAVE_LIBPORTAL_SESSION_CONNECT_TO_EIS)
+    message(WARNING "xdp_session_connect_to_eis not found")
+  endif()
+
+  if(NOT HAVE_LIBPORTAL_CREATE_REMOTE_DESKTOP_SESSION_FULL)
+    message(WARNING "xdp_portal_create_remote_desktop_session_full not found")
+  endif()
+
+  if(NOT HAVE_LIBPORTAL_INPUTCAPTURE)
+    message(WARNING "xdp_input_capture_session_connect_to_eis not found")
+  endif()
+
+  if(NOT HAVE_LIBPORTAL_OUTPUT_NONE)
+    message(WARNING "XDP_OUTPUT_NONE not found")
+  endif()
+
 endmacro()
 
 #
diff --git a/meson.build b/meson.build
index 32baeeb5b..10e0f295f 100644
--- a/meson.build
+++ b/meson.build
@@ -36,6 +36,6 @@ if host_machine.system() == 'linux'
     dependency('libportal', required: false)
   else
     # Using the subproject is only useful for development; it's not intended for normal use.
-    subproject('libportal', default_options: ['docs=false', 'backend-gtk3=enabled'])
+    subproject('libportal', default_options: ['docs=false', 'backend-gtk3=enabled', 'backend-qt6=disabled'])
   endif
 endif
diff --git a/res/config.h.in b/res/config.h.in
index 8a040406a..463d644f2 100644
--- a/res/config.h.in
+++ b/res/config.h.in
@@ -177,6 +177,3 @@
 
 /* Define if libportal has input capture support */
 #cmakedefine HAVE_LIBPORTAL_INPUTCAPTURE ${HAVE_LIBPORTAL_INPUTCAPTURE}
-
-/* Define if libei ei_device_start_emulating takes a sequence number */
-#cmakedefine HAVE_LIBEI_SEQUENCE_NUMBER ${HAVE_LIBEI_SEQUENCE_NUMBER}
diff --git a/scripts/install_deps.py b/scripts/install_deps.py
index 64673b2b5..1b5b52676 100755
--- a/scripts/install_deps.py
+++ b/scripts/install_deps.py
@@ -16,31 +16,7 @@ def main():
     if is_ci:
         print("CI environment detected")
 
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "--pause-on-exit", action="store_true", help="Useful on Windows"
-    )
-    parser.add_argument(
-        "--ci-env",
-        action="store_true",
-        help="Useful for faking CI env (defaults to true in CI env)",
-        default=is_ci,
-    )
-    parser.add_argument(
-        "--only-python", action="store_true", help="Only install Python dependencies"
-    )
-    parser.add_argument(
-        "--skip-system",
-        action="store_true",
-        help="Do not install system dependencies (apt, dnf, etc)",
-    )
-    parser.add_argument(
-        "--skip-meson", action="store_true", help="Do not setup and install with Meson"
-    )
-    parser.add_argument(
-        "--subproject", type=str, help="Sub-project to install dependencies for"
-    )
-    args = parser.parse_args()
+    args = parse_args(is_ci)
 
     env.ensure_dependencies()
     env.ensure_in_venv(__file__, auto_create=True)
@@ -86,6 +62,44 @@ def main():
         sys.exit(1)
 
 
+def parse_args(is_ci):
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--pause-on-exit", action="store_true", help="Useful on Windows"
+    )
+    parser.add_argument(
+        "--ci-env",
+        action="store_true",
+        help="Useful for faking CI env (defaults to true in CI env)",
+        default=is_ci,
+    )
+    parser.add_argument(
+        "--only-python", action="store_true", help="Only install Python dependencies"
+    )
+    parser.add_argument(
+        "--skip-system",
+        action="store_true",
+        help="Do not install system dependencies (apt, dnf, etc)",
+    )
+    parser.add_argument(
+        "--skip-meson", action="store_true", help="Do not setup and compile with Meson"
+    )
+    parser.add_argument(
+        "--subproject", type=str, help="Sub-project to install dependencies for"
+    )
+    parser.add_argument(
+        "--meson-install",
+        action="store_true",
+        help="Install built Meson subprojects to system",
+    )
+    parser.add_argument(
+        "--meson-no-system",
+        nargs="+",
+        help="Specify which Meson subprojects to use instead of system dependencies",
+    )
+    return parser.parse_args()
+
+
 def run(args):
     if args.subproject:
         deps = SubprojectDependencies(args.subproject)
@@ -97,20 +111,22 @@ def run(args):
         deps.install()
 
     if not args.skip_meson:
-        run_meson()
+        run_meson(args.meson_install, args.meson_no_system)
 
 
 # It's a bit weird to use Meson just for installing deps, but it's a stopgap until
 # we fully switch from CMake to Meson. For the meantime, Meson will install the deps
 # so that CMake can find them easily. Once we switch to Meson, it might be possible for
 # Meson handle the deps resolution, so that we won't need to install them on the system.
-def run_meson():
-    meson.setup()
+def run_meson(install, no_system_list):
+    meson.setup(no_system_list)
 
     # Only compile and install on Linux for now, since we're only using Meson to fetch
     # the deps on Windows and macOS.
     if env.is_linux():
         meson.compile()
+
+    if install:
         meson.install()
 
 
diff --git a/scripts/lib/meson.py b/scripts/lib/meson.py
index bd1fe6e54..39efd8b9c 100644
--- a/scripts/lib/meson.py
+++ b/scripts/lib/meson.py
@@ -6,14 +6,21 @@ build_dir = "build/meson"
 meson_bin = env.get_python_executable("meson")
 
 
-def setup():
+def setup(no_system_list):
     cmd = [meson_bin, "setup", build_dir]
 
     if env.is_windows():
         cmd.append("-Dsystem_gtest=false")
 
+    for subproject in no_system_list or []:
+        cmd.append(f"-Dsystem_{subproject}=false")
+
+    # This might be a bit rude, but Meson seems to cache a lot (like CMake),
+    # so wiping every time is the easiest way to ensure that the build is clean.
+    # Plus, the way we're using Meson (at the moment) is just for satisfying
+    # dependencies, so this script is run infrequently enough to not matter.
     if os.path.exists(build_dir):
-        cmd.append("--reconfigure")
+        cmd.append("--wipe")
 
     cmd_utils.run(cmd, print_cmd=True)
 
diff --git a/subprojects/libei.wrap b/subprojects/libei.wrap
index 83a5db463..ccd0acb76 100644
--- a/subprojects/libei.wrap
+++ b/subprojects/libei.wrap
@@ -1,3 +1,3 @@
 [wrap-git]
 url = https://gitlab.freedesktop.org/libinput/libei.git
-revision = tags/1.3.0
+revision = main
diff --git a/subprojects/libportal.wrap b/subprojects/libportal.wrap
index d0fb1f7e6..da1ed2c4e 100644
--- a/subprojects/libportal.wrap
+++ b/subprojects/libportal.wrap
@@ -1,3 +1,3 @@
 [wrap-git]
 url = https://github.com/flatpak/libportal.git
-revision = a1530a9
+revision = main