diff --git a/src/calibre/gui2/icon_theme.py b/src/calibre/gui2/icon_theme.py
index 533bf6f292..738cf0eeab 100644
--- a/src/calibre/gui2/icon_theme.py
+++ b/src/calibre/gui2/icon_theme.py
@@ -37,7 +37,7 @@ from calibre.utils.icu import numeric_sort_key as sort_key
 from calibre.utils.img import image_from_data, Canvas, optimize_png, optimize_jpeg
 from calibre.utils.zipfile import ZipFile, ZIP_STORED
 from calibre.utils.filenames import atomic_rename
-from lzma.xz import compress, decompress
+from calibre_lzma.xz import compress, decompress
 from polyglot.builtins import iteritems, map, range, reraise, filter, as_bytes, unicode_type
 from polyglot import http_client
 from polyglot.queue import Queue, Empty
diff --git a/src/calibre/test_build.py b/src/calibre/test_build.py
index 36aebba66b..e1bb453c23 100644
--- a/src/calibre/test_build.py
+++ b/src/calibre/test_build.py
@@ -65,7 +65,7 @@ class BuildTest(unittest.TestCase):
         self.assertEqual(detector.result['encoding'], 'utf-8')
 
     def test_lzma(self):
-        from lzma.xz import test_lzma2
+        from calibre_lzma.xz import test_lzma2
         test_lzma2()
 
     def test_html5lib(self):
diff --git a/src/calibre/utils/rapydscript.py b/src/calibre/utils/rapydscript.py
index caffcdc02a..90933ea71d 100644
--- a/src/calibre/utils/rapydscript.py
+++ b/src/calibre/utils/rapydscript.py
@@ -30,7 +30,7 @@ def abspath(x):
 
 
 def update_rapydscript():
-    from lzma.xz import compress
+    from calibre_lzma.xz import compress
     d = os.path.dirname
     base = d(d(d(d(d(abspath(__file__))))))
     base = os.path.join(base, 'rapydscript')
@@ -51,7 +51,7 @@ def to_dict(obj):
 
 
 def compiler():
-    from lzma.xz import decompress
+    from calibre_lzma.xz import decompress
     ans = getattr(compiler, 'ans', None)
     if ans is not None:
         return ans
diff --git a/src/lzma/lzma1.py b/src/lzma/lzma1.py
index d28013ec72..5e842407cd 100644
--- a/src/lzma/lzma1.py
+++ b/src/lzma/lzma1.py
@@ -9,7 +9,8 @@ from io import BytesIO
 from struct import unpack
 
 from calibre.ptempfile import SpooledTemporaryFile
-from lzma.errors import NotLzma, lzma
+from .errors import NotLzma, lzma
+
 
 def read_header(f):
     raw = f.read(13)
@@ -21,17 +22,21 @@ def read_header(f):
         raise NotLzma('Not a LZMA file')
     return uncompressed_size, raw
 
-def decompress(raw, outfile=None, bufsize=10*1024*1024):
+
+def decompress(raw, outfile=None, bufsize=10 * 1024 * 1024):
     if isinstance(raw, bytes):
         raw = BytesIO(raw)
     uncompressed_size, header = read_header(raw)
     outfile = outfile or SpooledTemporaryFile(50 * 1024 * 1024, '_lzma_decompress')
-    lzma.decompress(raw.read, raw.seek, outfile.write, uncompressed_size, header, bufsize)
+    lzma.decompress(
+        raw.read, raw.seek, outfile.write, uncompressed_size, header, bufsize
+    )
     if uncompressed_size < outfile.tell():
         outfile.seek(uncompressed_size)
         outfile.truncate()
     return outfile
 
+
 if __name__ == '__main__':
     import sys
     decompress(open(sys.argv[-1], 'rb'))
diff --git a/src/lzma/xz.py b/src/lzma/xz.py
index 0020325480..2e82ea85f7 100644
--- a/src/lzma/xz.py
+++ b/src/lzma/xz.py
@@ -14,7 +14,7 @@ from struct import unpack, error as struct_error, pack
 from binascii import crc32 as _crc32
 
 from calibre.ptempfile import SpooledTemporaryFile
-from lzma.errors import NotXZ, InvalidXZ, lzma
+from .errors import NotXZ, InvalidXZ, lzma
 from polyglot.builtins import error_message
 
 HEADER_MAGIC = b'\xfd7zXZ\0'