diff --git a/README.md b/README.md
index 0b94226..9c5320a 100644
--- a/README.md
+++ b/README.md
@@ -4,13 +4,14 @@
 В основе лежит моноширинный шрифт [Iosevka](https://github.com/be5invis/Iosevka/) и
 встраиваемый в шрифт набор иконок [Nerd Fonts](https://www.nerdfonts.com/).
 
-Для сборки требуется установка [Docker](https://www.docker.com/):
+Для сборки требуется установка [Docker](https://www.docker.com/) и библиотека
+для работы со шрифтами [fonttools](https://pypi.org/project/fonttools/):
 
 ```sh
-sudo apt-get install docker.io
+sudo apt-get install docker.io python3-fonttools
 ```
 
 Сборка шрифта выполняется командой `make`, результат сохраняется в каталог `dist`.
 
-Готовый шрифт версии [22.1.2](../../../releases/download/22.1.2/iosevka-prog-22.1.2.tar.xz).
+Готовый шрифт версии [25.1.1](../../../releases/download/25.1.1/iosevka-prog-25.1.1.tar.xz).
 
diff --git a/build-iosevka-prog-font.sh b/build-iosevka-prog-font.sh
index 712e90a..8f6dc76 100755
--- a/build-iosevka-prog-font.sh
+++ b/build-iosevka-prog-font.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-IOSEVKA_VERSION=22.1.2
+IOSEVKA_VERSION=25.1.1
 FONT_NAME=iosevka-prog
 FILE=$( readlink -f "${BASH_SOURCE[0]}" )
 DIR=$( dirname "${FILE}" )
@@ -20,14 +20,21 @@ if [ -r "${CONFIG}" ]; then
 		sudo chown -R "$(id -u)":"$(id -g)" "${DIST}"
 		mkdir -p "${OBLIQUE}"
 		cp -af "${OUT_DIR}/${FONT_NAME}-oblique.ttf" "${OBLIQUE}"
-		docker run -v "${OBLIQUE}":/in -v "${OUT_DIR}":/out nerdfonts/patcher --complete --careful --adjust-line-height --makegroups || true
+		docker run --rm -v "${OBLIQUE}":/in -v "${OUT_DIR}":/out nerdfonts/patcher --complete --adjust-line-height --makegroups 1
 		mkdir -p "${REGULAR}"
 		cp -af "${OUT_DIR}/${FONT_NAME}-regular.ttf" "${REGULAR}"
-		docker run -v "${REGULAR}":/in -v "${OUT_DIR}":/out nerdfonts/patcher --complete --careful --adjust-line-height --makegroups --mono --removeligatures || true
+		docker run --rm -v "${REGULAR}":/in -v "${OUT_DIR}":/out nerdfonts/patcher --complete --adjust-line-height --makegroups 1 --mono --removeligatures
+		sudo chown -R "$(id -u)":"$(id -g)" "${DIST}"
 		cd "${OUT_DIR}"
-		tar acf "${DIST}/fonts-iosevka-prog-nerd_${IOSEVKA_VERSION}.orig.tar.xz" Iosevka*Nerd*ttf
-		tar acf "${DIST}/fonts-iosevka-prog_${IOSEVKA_VERSION}.orig.tar.xz" iosevka*ttf
+		python3 "${DIR}/fontname.py" "Iosevka Prog Nerd Font" IosevkaProgNerdFont-Oblique.ttf
+		python3 "${DIR}/fontname.py" "Iosevka Prog Nerd Font Mono" IosevkaProgNerdFontMono-Regular.ttf
 		tar acf "${DIST}/iosevka-prog-${IOSEVKA_VERSION}.tar.xz" *ttf
+		mkdir -p "iosevka-prog-nerd-$IOSEVKA_VERSION"
+		mv Iosevka*Nerd*ttf "iosevka-prog-nerd-$IOSEVKA_VERSION"
+		tar acf "${DIST}/fonts-iosevka-prog-nerd_${IOSEVKA_VERSION}.orig.tar.xz" "iosevka-prog-nerd-$IOSEVKA_VERSION"
+		mkdir -p "iosevka-prog-$IOSEVKA_VERSION"
+		mv iosevka*ttf "iosevka-prog-$IOSEVKA_VERSION"
+		tar acf "${DIST}/fonts-iosevka-prog_${IOSEVKA_VERSION}.orig.tar.xz" "iosevka-prog-$IOSEVKA_VERSION"
 	else
 		echo "Docker executable not found"
 	fi
diff --git a/fontname.py b/fontname.py
new file mode 100644
index 0000000..26f0294
--- /dev/null
+++ b/fontname.py
@@ -0,0 +1,134 @@
+#!/usr/bin/env python3
+
+# ==========================================================================
+# fontname.py
+# Copyright 2019 Christopher Simpkins
+# MIT License
+#
+# Dependencies:
+#   1) Python 3.6+ interpreter
+#   2) fonttools Python library (https://github.com/fonttools/fonttools)
+#         - install with `pip3 install fonttools`
+#
+# Usage:
+#   python3 fontname.py [FONT FAMILY NAME] [FONT PATH 1] <FONT PATH ...>
+#
+# Notes:
+#   Use quotes around font family name arguments that include spaces
+# ===========================================================================
+
+import os
+import sys
+
+from fontTools import ttLib
+
+
+def main(argv):
+    # command argument tests
+    print(" ")
+    if len(argv) < 2:
+        sys.stderr.write(
+            f"[fontname.py] ERROR: you did not include enough arguments to the script.{os.linesep}"
+        )
+        sys.stderr.write(
+            f"Usage: python3 fontname.py [FONT FAMILY NAME] [FONT PATH 1] <FONT PATH ...>{os.linesep}"
+        )
+        sys.exit(1)
+
+    # begin parsing command line arguments
+    try:
+        font_name = str(argv[0])  # the first argument is the new typeface name
+    except Exception as e:
+        sys.stderr.write(
+            f"[fontname.py] ERROR: Unable to convert argument to string. {e}{os.linesep}"
+        )
+        sys.exit(1)
+
+    # all remaining arguments on command line are file paths to fonts
+    font_path_list = argv[1:]
+
+    # iterate through all paths provided on command line and rename to `font_name` defined by user
+    for font_path in font_path_list:
+        # test for existence of font file on requested file path
+        if not file_exists(font_path):
+            sys.stderr.write(
+                f"[fontname.py] ERROR: the path '{font_path}' does not appear to be a valid file path.{os.linesep}"
+            )
+            sys.exit(1)
+
+        tt = ttLib.TTFont(font_path)
+        namerecord_list = tt["name"].names
+
+        style = ""
+
+        # determine font style for this file path from name record nameID 2
+        for record in namerecord_list:
+            if record.nameID == 2:
+                style = str(record)
+                break
+
+        # test that a style name was found in the OpenType tables of the font
+        if len(style) == 0:
+            sys.stderr.write(
+                f"[fontname.py] Unable to detect the font style from the OpenType name table in '{font_path}'. {os.linesep}"
+            )
+            sys.stderr.write("Unable to complete execution of the script.")
+            sys.exit(1)
+        else:
+            # used for the Postscript name in the name table (no spaces allowed)
+            postscript_font_name = font_name.replace(" ", "")
+            # font family name
+            nameID1_string = font_name
+            nameID16_string = font_name
+            # full font name
+            nameID4_string = f"{font_name} {style}"
+            # Postscript name
+            # - no spaces allowed in family name or the PostScript suffix. should be dash delimited
+            nameID6_string = f"{postscript_font_name}-{style.replace(' ', '')}"
+            # nameID6_string = postscript_font_name + "-" + style.replace(" ", "")
+
+            # modify the opentype table data in memory with updated values
+            for record in namerecord_list:
+                if record.nameID == 1:
+                    record.string = nameID1_string
+                elif record.nameID == 4:
+                    record.string = nameID4_string
+                elif record.nameID == 6:
+                    record.string = nameID6_string
+                elif record.nameID == 16:
+                    record.string = nameID16_string
+
+            # CFF table naming for CFF fonts (only)
+            if "CFF " in tt:
+                try:
+                    cff = tt["CFF "]
+                    cff.cff[0].FamilyName = nameID1_string
+                    cff.cff[0].FullName = nameID4_string
+                    cff.cff.fontNames = [nameID6_string]
+                except Exception as e:
+                    sys.stderr.write(
+                        f"[fontname.py] ERROR: unable to write new names to CFF table: {e}"
+                    )
+
+        # write changes to the font file
+        try:
+            tt.save(font_path)
+            print(f"[OK] Updated '{font_path}' with the name '{nameID4_string}'")
+        except Exception as e:
+            sys.stderr.write(
+                f"[fontname.py] ERROR: unable to write new name to OpenType name table for '{font_path}'. {os.linesep}"
+            )
+            sys.stderr.write(f"{e}{os.linesep}")
+            sys.exit(1)
+
+
+# Utilities
+
+
+def file_exists(filepath):
+    """Tests for existence of a file on the string filepath"""
+    return os.path.exists(filepath) and os.path.isfile(filepath)
+
+
+if __name__ == "__main__":
+    main(sys.argv[1:])