diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index 9e9d8b16f..fecab9154 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -92,7 +92,11 @@ if (NOT TARGET glslang)
       # Glslang tests are off by default. Turn them on if testing Shaderc.
       set(GLSLANG_TESTS ON)
     endif()
-    set(GLSLANG_ENABLE_INSTALL $<NOT:${SKIP_GLSLANG_INSTALL}>)
+    if (SKIP_GLSLANG_INSTALL)
+      set(GLSLANG_ENABLE_INSTALL OFF)
+    else()
+      set(GLSLANG_ENABLE_INSTALL ON)
+    endif()
     set(ENABLE_HLSL "${SHADERC_ENABLE_HLSL}")
     add_subdirectory(${SHADERC_GLSLANG_DIR} glslang)
   endif()