diff -Nru python3-defaults-3.8.2/debian/changelog python3-defaults-3.8.2/debian/changelog
--- python3-defaults-3.8.2/debian/changelog	2020-02-28 13:01:25.000000000 +0000
+++ python3-defaults-3.8.2/debian/changelog	2020-03-13 12:20:20.000000000 +0000
@@ -1,3 +1,17 @@
+python3-defaults (3.8.2-0ubuntu2) focal; urgency=medium
+
+  [ Dimitri John Ledkov ]
+  * Correct command-not-found XB-Cnf headers LP: #1867157:
+    - Drop Extra-Commands headers not needed
+    - Add XB- to ensure Visible-Pkgname actually is included in the binary
+      package heders
+
+  [ Stuart Prescott ]
+  * Use unbuffered IO to pass filenames to py_compile (Closes: #953056)
+    LP: #1863414
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Fri, 13 Mar 2020 12:20:20 +0000
+
 python3-defaults (3.8.2-0ubuntu1) focal; urgency=medium
 
   * Bump version to 3.8.2.
diff -Nru python3-defaults-3.8.2/debian/control python3-defaults-3.8.2/debian/control
--- python3-defaults-3.8.2/debian/control	2020-02-28 13:01:25.000000000 +0000
+++ python3-defaults-3.8.2/debian/control	2020-03-13 12:19:29.000000000 +0000
@@ -32,8 +32,6 @@
  .
  This package is a dependency package, which depends on Debian's default
  Python 3 version (currently v3.8).
-XB-Cnf-Extra-Commands: python
-XB-Cnf-Priority-Bonus: 5
 
 Package: python3-venv
 Architecture: any
@@ -58,7 +56,7 @@
  in the boot process for some basic tasks.
  See /usr/share/doc/python3.8-minimal/README.Debian for a list of the modules
  contained in this package.
-Cnf-Visible-Pkgname: python3
+XB-Cnf-Visible-Pkgname: python3
 
 Package: python3-examples
 Architecture: all
diff -Nru python3-defaults-3.8.2/debian/control.in python3-defaults-3.8.2/debian/control.in
--- python3-defaults-3.8.2/debian/control.in	2020-02-28 13:01:25.000000000 +0000
+++ python3-defaults-3.8.2/debian/control.in	2020-03-13 12:19:29.000000000 +0000
@@ -31,8 +31,6 @@
  .
  This package is a dependency package, which depends on Debian's default
  Python 3 version (currently v@VER@).
-XB-Cnf-Extra-Commands: python
-XB-Cnf-Priority-Bonus: 5
 
 Package: python3-venv
 Architecture: any
@@ -57,7 +55,7 @@
  in the boot process for some basic tasks.
  See /usr/share/doc/python@VER@-minimal/README.Debian for a list of the modules
  contained in this package.
-Cnf-Visible-Pkgname: python3
+XB-Cnf-Visible-Pkgname: python3
 
 Package: python3-examples
 Architecture: all
diff -Nru python3-defaults-3.8.2/py3compile python3-defaults-3.8.2/py3compile
--- python3-defaults-3.8.2/py3compile	2018-06-05 21:35:36.000000000 +0000
+++ python3-defaults-3.8.2/py3compile	2020-03-13 12:19:29.000000000 +0000
@@ -129,7 +129,7 @@
         version = vrepr(version)
     cmd = "/usr/bin/python%s%s -m py_compile -" \
         % (version, ' -O' if optimize else '')
-    process = Popen(cmd, bufsize=1, shell=True,
+    process = Popen(cmd, bufsize=0, shell=True,
                     stdin=PIPE, close_fds=True)
     workers[version] = process  # keep the reference for .communicate()
     stdin = process.stdin