diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e3f4bc..695802c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,14 +1,16 @@
-#################################
-# mars-dosutils
-##############
+# DOS utilities for mars-nwe.
+#
+# Default mode: install a prebuilt net.exe from this source tree. This keeps the
+# normal mars-nwe build independent from Open Watcom.
+#
+# Maintainer mode: configure with -DMARS_NWE_BUILD_DOSUTILS=ON to rebuild
+# net.exe with Open Watcom v2 on Linux.
 
 set(MARS_DOSUTILS_NET_EXE
     "${CMAKE_CURRENT_SOURCE_DIR}/net.exe"
-    CACHE FILEPATH "Prebuilt DOS net.exe used for installation"
+    CACHE FILEPATH "Prebuilt DOS net.exe used for installation when MARS_NWE_BUILD_DOSUTILS is OFF"
 )
 
-set(MARS_DOSUTILS_STACK_SIZE "32768" CACHE STRING "DOS stack size for mars-dosutils net.exe")
-
 set(MARS_DOSUTILS_PUBLIC_TOOLS
     net
     login
@@ -26,6 +28,9 @@ set(MARS_DOSUTILS_PUBLIC_TOOLS
     endcap
 )
 
+# Do not install slist.exe yet: func_slist() is empty and SLIST is disabled in net.c.
+# Do not install tests/debug by default either; they are developer-only helpers.
+
 if(MARS_NWE_BUILD_DOSUTILS)
     find_package(OpenWatcom REQUIRED)
 
@@ -45,11 +50,7 @@ if(MARS_NWE_BUILD_DOSUTILS)
 
     add_custom_command(
         OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/kern.obj"
-        COMMAND "${CMAKE_COMMAND}" -E env
-                "WATCOM=${OPENWATCOM_ROOT}"
-                "PATH=${OPENWATCOM_BINDIR}:$ENV{PATH}"
-                "INCLUDE=${OPENWATCOM_INCLUDE}"
-                "EDPATH=${OPENWATCOM_ROOT}/eddat"
+        COMMAND "${CMAKE_COMMAND}" -E env ${OPENWATCOM_ENV}
                 "${OPENWATCOM_WASM}"
                 -q
                 -zq
@@ -62,18 +63,14 @@ if(MARS_NWE_BUILD_DOSUTILS)
 
     add_custom_command(
         OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/net.exe"
-        COMMAND "${CMAKE_COMMAND}" -E env
-                "WATCOM=${OPENWATCOM_ROOT}"
-                "PATH=${OPENWATCOM_BINDIR}:$ENV{PATH}"
-                "INCLUDE=${OPENWATCOM_INCLUDE}"
-                "EDPATH=${OPENWATCOM_ROOT}/eddat"
+        COMMAND "${CMAKE_COMMAND}" -E env ${OPENWATCOM_ENV}
                 "${OPENWATCOM_WCL}"
                 -q
                 -zq
                 -bt=dos
                 -ml
                 -0
-                -k${MARS_DOSUTILS_STACK_SIZE}
+                -k32768
                 -fe="${CMAKE_CURRENT_BINARY_DIR}/net.exe"
                 ${DOSUTILS_C_SOURCES}
                 "${CMAKE_CURRENT_BINARY_DIR}/kern.obj"
@@ -97,7 +94,7 @@ else()
         message(FATAL_ERROR
             "Prebuilt DOS utility missing: ${MARS_DOSUTILS_NET_EXE}. "
             "Either commit net.exe into dosutils or configure with "
-            "-DMARS_NWE_BUILD_DOSUTILS=ON and OpenWatcom installed."
+            "-DMARS_NWE_BUILD_DOSUTILS=ON and Open Watcom installed."
         )
     endif()
 endif()