diff --git a/CMakeLists.txt b/CMakeLists.txt
index 29ad7b6..156ba2d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,7 @@ endif()
 project(SPTK VERSION 4.4)
 
 option(SPTK_INSTALL "Install SPTK library" ON)
+option(SPTK_INSTALL_DRAW_COMMANDS "Install Python-based drawing commands" ON)
 option(SPTK_BUILD_COMMANDS "Build SPTK commands" ON)
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
@@ -420,12 +421,15 @@ set(PYTHON_SOURCES
     ${SOURCE_DIR}/draw/gspecgram.py
     ${SOURCE_DIR}/draw/gwave.py)
 
-if(NOT WIN32 AND SPTK_INSTALL)
+if(NOT WIN32 AND SPTK_INSTALL_DRAW_COMMANDS)
+  install(FILES ${SOURCE_DIR}/draw/sptk/draw_utils.py
+          DESTINATION ${CMAKE_INSTALL_LIBDIR}/sptk)
+
   foreach(SOURCE ${PYTHON_SOURCES})
     get_filename_component(BIN ${SOURCE} NAME_WE)
-    execute_process(COMMAND ln -snf ${SOURCE}
-                            ${CMAKE_CURRENT_BINARY_DIR}/${BIN})
-    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${BIN}
-            DESTINATION ${CMAKE_INSTALL_BINDIR})
+    install(
+      PROGRAMS ${SOURCE}
+      DESTINATION ${CMAKE_INSTALL_BINDIR}
+      RENAME ${BIN})
   endforeach()
 endif()
diff --git a/src/draw/fdrw.py b/src/draw/fdrw.py
index 990c29f..7d6967a 100755
--- a/src/draw/fdrw.py
+++ b/src/draw/fdrw.py
@@ -21,7 +21,10 @@
 import numpy as np
 import plotly.graph_objs as go
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():
diff --git a/src/draw/glogsp.py b/src/draw/glogsp.py
index 93c867a..4c7b574 100755
--- a/src/draw/glogsp.py
+++ b/src/draw/glogsp.py
@@ -21,7 +21,10 @@
 import numpy as np
 import plotly.graph_objs as go
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():
diff --git a/src/draw/gpolezero.py b/src/draw/gpolezero.py
index 844262c..24d5962 100755
--- a/src/draw/gpolezero.py
+++ b/src/draw/gpolezero.py
@@ -21,7 +21,10 @@
 import numpy as np
 import plotly.graph_objs as go
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():
diff --git a/src/draw/grlogsp.py b/src/draw/grlogsp.py
index 84d3469..14dedd7 100755
--- a/src/draw/grlogsp.py
+++ b/src/draw/grlogsp.py
@@ -21,7 +21,10 @@
 import numpy as np
 import plotly.graph_objs as go
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():
diff --git a/src/draw/gseries.py b/src/draw/gseries.py
index 337892e..8392fc0 100755
--- a/src/draw/gseries.py
+++ b/src/draw/gseries.py
@@ -22,7 +22,10 @@
 import plotly.graph_objs as go
 from plotly.subplots import make_subplots
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():
diff --git a/src/draw/gspecgram.py b/src/draw/gspecgram.py
index 5e77a42..776f251 100755
--- a/src/draw/gspecgram.py
+++ b/src/draw/gspecgram.py
@@ -23,7 +23,10 @@
 from plotly.subplots import make_subplots
 from scipy import signal
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():
diff --git a/src/draw/gwave.py b/src/draw/gwave.py
index b6dba7d..1d876bd 100755
--- a/src/draw/gwave.py
+++ b/src/draw/gwave.py
@@ -22,7 +22,10 @@
 import plotly.graph_objs as go
 from plotly.subplots import make_subplots
 
-import sptk.draw_utils as utils
+script_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.append(os.path.join(script_dir, "..", "lib"))
+
+import sptk.draw_utils as utils  # noqa: E402
 
 
 def get_arguments():