diff --git a/src/mesa/util/os_socket.h b/src/mesa/util/os_socket.h
index 0d6f8749..f33a685b 100644
--- a/src/mesa/util/os_socket.h
+++ b/src/mesa/util/os_socket.h
@@ -10,6 +10,7 @@
 
 #include <stdio.h>
 #include <stdbool.h>
+#include <sys/types.h>
 #ifdef _MSC_VER
 #include <BaseTsd.h>
 typedef SSIZE_T ssize_t;
diff --git a/src/mesa/util/os_time.c b/src/mesa/util/os_time.c
index c5c47657..dbabc0f3 100644
--- a/src/mesa/util/os_time.c
+++ b/src/mesa/util/os_time.c
@@ -50,6 +50,8 @@
 #  include <errno.h>
 #elif DETECT_OS_WINDOWS
 #  include <windows.h>
+#elif __EMSCRIPTEN__
+
 #else
 #  error Unsupported OS
 #endif
@@ -93,6 +95,8 @@ os_time_get_nano(void)
       / frequency.QuadPart;
    return secs*INT64_C(1000000000) + nanosecs;
 
+#elif __EMSCRIPTEN__
+   return 0;
 #else
 
 #error Unsupported OS
@@ -120,6 +124,8 @@ os_time_sleep(int64_t usecs)
    if (dwMilliseconds) {
       Sleep(dwMilliseconds);
    }
+#elif __EMSCRIPTEN__
+
 #else
 #  error Unsupported OS
 #endif
diff --git a/src/meson.build b/src/meson.build
index 838e273f..45fd3721 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -67,7 +67,6 @@ if is_unixy or cpp.get_id() == 'emscripten'
     'memory.cpp',
     'iostats.cpp',
     'elfhacks.cpp',
-    'real_dlsym.cpp',
     'pci_ids.cpp',
     'battery.cpp',
     'control.cpp',
@@ -76,6 +75,10 @@ if is_unixy or cpp.get_id() == 'emscripten'
     'intel.cpp'
   )
 
+  if cpp.get_id() != 'emscripten'
+    vklayer_files += 'real_dlsym.cpp'
+  endif
+
   if get_option('with_notify').enabled()
     vklayer_files += 'notify.cpp'
   endif
diff --git a/src/overlay_params.cpp b/src/overlay_params.cpp
index f7acc00d..c2c4d598 100644
--- a/src/overlay_params.cpp
+++ b/src/overlay_params.cpp
@@ -97,9 +97,11 @@ static int
 parse_control(const char *str)
 {
    std::string path(str);
+#ifndef __EMSCRIPTEN__
    size_t npos = path.find("%p");
    if (npos != std::string::npos)
       path.replace(npos, 2, std::to_string(getpid()));
+#endif
    SPDLOG_DEBUG("Socket: {}", path);
 
    int ret = os_socket_listen_abstract(path.c_str(), 1);