--- a/cmake-scripts/asy-base-files.cmake
+++ b/cmake-scripts/asy-base-files.cmake
@@ -76,7 +76,12 @@ file(MAKE_DIRECTORY ${ASY_BUILD_BASE_DIR
 
 set(ASYGL_OUTPUT_LOCATION_BASE webgl/asygl.js)
 if(USE_PREBUILT_WEBGL_LIB)
-    copy_base_file_with_custom_output_name(webgl/asygl-${ASY_GL_VERSION}.js ${ASYGL_OUTPUT_LOCATION_BASE})
+    if(EXISTS ${ASY_SOURCE_BASE_DIR}/webgl/asygl-${ASY_GL_VERSION}.js)
+        copy_base_file_with_custom_output_name(webgl/asygl-${ASY_GL_VERSION}.js ${ASYGL_OUTPUT_LOCATION_BASE})
+    else()
+        # release tarballs only ship the prebuilt asygl.js
+        copy_base_file_with_custom_output_name(webgl/asygl.js ${ASYGL_OUTPUT_LOCATION_BASE})
+    endif()
 else()
     set(ASYGL_OUTPUT ${ASY_BUILD_BASE_DIR}/${ASYGL_OUTPUT_LOCATION_BASE})
     add_custom_command(
--- a/cmake-scripts/linux-install.cmake
+++ b/cmake-scripts/linux-install.cmake
@@ -55,8 +55,14 @@ install(
 )
 
 # extra base files -> <sysdir>/
+if (ENABLE_MISCFILES_GEN)
+    set(ASY_KEYWORDS_EL_FILE ${ASY_MISC_FILES_OUT_DIR}/asy-keywords.el)
+else()
+    # shipped in release tarballs
+    set(ASY_KEYWORDS_EL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/asy-keywords.el)
+endif()
 install(
-        FILES ${ASY_MISC_FILES_OUT_DIR}/asy-keywords.el ${ASY_BASE_EXTRA_FILES}
+        FILES ${ASY_KEYWORDS_EL_FILE} ${ASY_BASE_EXTRA_FILES}
         DESTINATION ${ASY_INSTALL_SYSDIR_VALUE}
         COMPONENT ${ASY_BASE_INSTALL_COMPONENT}
         PERMISSIONS ${PERMISSION_644_LIST}
--- a/cmake-scripts/subrepo-projects.cmake
+++ b/cmake-scripts/subrepo-projects.cmake
@@ -4,10 +4,10 @@ set(LSP_REPO_ROOT ${ASY_SUBREPO_CLONE_RO
 set(TINYEXR_SUBREPO_ROOT ${ASY_SUBREPO_CLONE_ROOT}/tinyexr)
 set(BOEHM_GC_ROOT ${ASY_SUBREPO_CLONE_ROOT}/gc)
 set(LIBATOMIC_OPS_ROOT ${ASY_SUBREPO_CLONE_ROOT}/libatomic_ops)
-# boehm gc
+# boehm gc, bundled sub projects are linked statically, not installed
 if (ENABLE_GC)
     set(enable_gpl OFF CACHE INTERNAL "libatomicops gpl libs option")
-    add_subdirectory(${LIBATOMIC_OPS_ROOT})
+    add_subdirectory(${LIBATOMIC_OPS_ROOT} EXCLUDE_FROM_ALL)
 
     set(OLD_CFLAG_EXTRA ${CFLAG_EXTRA})
     set(CFLAGS_EXTRA -I${LIBATOMIC_OPS_ROOT}/src)  # for bdwgc
@@ -21,7 +21,7 @@ if (ENABLE_GC)
         set(enable_throw_bad_alloc_library OFF CACHE INTERNAL "bdwgc gctba library (Windows-only in asymptote)")
     endif()
     set(enable_large_config ON CACHE INTERNAL "bdwgc large config")
-    add_subdirectory(${BOEHM_GC_ROOT})
+    add_subdirectory(${BOEHM_GC_ROOT} EXCLUDE_FROM_ALL)
 
     set(CFLAG_EXTRA ${OLD_CFLAG_EXTRA})
     unset(BUILD_SHARED_LIBS CACHE)
@@ -75,7 +75,7 @@ if (ENABLE_LSP)
         set(LSPCPP_GC_STATIC ON CACHE INTERNAL "lsp use static gc")
     endif()
 
-    add_subdirectory(${LSP_REPO_ROOT})
+    add_subdirectory(${LSP_REPO_ROOT} EXCLUDE_FROM_ALL)
 
     list(APPEND ASY_STATIC_LIBRARIES lspcpp)
     list(APPEND ASY_MACROS HAVE_LSP=1)