diff --git a/pkgs/development/python-modules/psutil/default.nix b/pkgs/development/python-modules/psutil/default.nix
index a53005c7426a..ba17c5eca737 100644
--- a/pkgs/development/python-modules/psutil/default.nix
+++ b/pkgs/development/python-modules/psutil/default.nix
@@ -15,16 +15,25 @@ buildPythonPackage rec {
     sha256 = "1immnj532bnnrh1qmk5q3lsw3san8qfk9kxy1cpmy0knmfcwp70c";
   };
 
-  # arch doesn't report frequency is the same way
-  # tests segfaults on darwin https://github.com/giampaolo/psutil/issues/1715
-  doCheck = !stdenv.isDarwin && stdenv.isx86_64;
+  # We have many test failures on various parts of the package:
+  #  - segfaults on darwin:
+  #    https://github.com/giampaolo/psutil/issues/1715
+  #  - swap (on linux) might cause test failures if it is fully used:
+  #    https://github.com/giampaolo/psutil/issues/1911
+  #  - some mount paths are required in the build sanbox to make the tests succeed:
+  #    https://github.com/giampaolo/psutil/issues/1912
+  doCheck = false;
   checkInputs = [ pytestCheckHook ]
-    ++ lib.optionals isPy27 [ mock ipaddress unittest2 ];
+  ++ lib.optionals isPy27 [ mock ipaddress unittest2 ];
+  # In addition to the issues listed above there are some that occure due to
+  # our sandboxing which we can work around by disabling some tests:
+  # - cpu_times was flaky on darwin
+  # - the other disabled tests are likely due to sanboxing (missing specific errors)
   pytestFlagsArray = [
     "$out/${python.sitePackages}/psutil/tests/test_system.py"
   ];
-  # disable tests which don't work in sandbox
-  # cpu_times is flakey on darwin
+
+  # Note: $out must be referenced as test import paths are relative
   disabledTests = [
     "user"
     "disk_io_counters"
diff --git a/pkgs/development/tools/misc/autoconf/default.nix b/pkgs/development/tools/misc/autoconf/default.nix
index ae8fc2d90619..3b70e819c899 100644
--- a/pkgs/development/tools/misc/autoconf/default.nix
+++ b/pkgs/development/tools/misc/autoconf/default.nix
@@ -6,11 +6,11 @@
 # files.
 
 stdenv.mkDerivation rec {
-  name = "autoconf-2.70";
+  name = "autoconf-2.71";
 
   src = fetchurl {
     url = "mirror://gnu/autoconf/${name}.tar.xz";
-    sha256 = "1ipckz0wr2mvhj9n3ys54fmf2aksin6bhqvzl304bn6rc1w257ps";
+    sha256 = "197sl23irn6s9pd54rxj5vcp5y8dv65jb9yfqgr2g56cxg7q6k7i";
   };
 
   nativeBuildInputs = [ m4 perl ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e491a48aa8c8..b3e669bab95f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12500,14 +12500,14 @@ in
 
   autobuild = callPackage ../development/tools/misc/autobuild { };
 
-  autoconf = autoconf270;
+  autoconf = autoconf271;
 
   autoconf-archive = callPackage ../development/tools/misc/autoconf-archive { };
 
   autoconf213 = callPackage ../development/tools/misc/autoconf/2.13.nix { };
   autoconf264 = callPackage ../development/tools/misc/autoconf/2.64.nix { };
   autoconf269 = callPackage ../development/tools/misc/autoconf/2.69.nix { };
-  autoconf270 = callPackage ../development/tools/misc/autoconf { };
+  autoconf271 = callPackage ../development/tools/misc/autoconf { };
 
   autocutsel = callPackage ../tools/X11/autocutsel{ };