diff --git a/pkgs/tools/system/plan9port/default.nix b/pkgs/tools/system/plan9port/default.nix
index db206fa0b338..54e88f5d0699 100644
--- a/pkgs/tools/system/plan9port/default.nix
+++ b/pkgs/tools/system/plan9port/default.nix
@@ -11,17 +11,16 @@
 
 stdenv.mkDerivation {
   pname = "plan9port";
-  version = "2019-02-25";
+  version = "2020-01-08";
 
   src =  fetchFromGitHub {
     owner = "9fans";
     repo = "plan9port";
-    rev = "047fd921744f39a82a86d9370e03f7af511e6e84";
-    sha256 = "1lp17948q7vpl8rc2bf5a45bc8jqyj0s3zffmks9r25ai42vgb43";
+    rev = "cc3d97d52a72d7eaceb5b636bcdf81c3e19f7a2e";
+    sha256 = "0gb55kj0gzx1kdhiwcrbr7xcgz1im21dyxgxhfhh6d0q9rw0c17g";
   };
 
   patches = [
-    ./tmpdir.patch
     ./darwin-sw_vers.patch
     ./darwin-cfframework.patch
   ];
@@ -90,7 +89,7 @@ stdenv.mkDerivation {
     license = licenses.lpl-102;
     maintainers = with maintainers; [ AndersonTorres bbarker
                                       ftrvxmtrx kovirobi ];
-    platforms = platforms.unix;
+    platforms = remove "aarch64-linux" platforms.unix;
   };
 }
 # TODO: investigate the mouse chording support patch
diff --git a/pkgs/tools/system/plan9port/tmpdir.patch b/pkgs/tools/system/plan9port/tmpdir.patch
deleted file mode 100644
index e8200a177a27..000000000000
--- a/pkgs/tools/system/plan9port/tmpdir.patch
+++ /dev/null
@@ -1,41 +0,0 @@
-From c762625549ff367b54bcd8281d1ce248a69b4401 Mon Sep 17 00:00:00 2001
-From: Jason Felice <jason.m.felice@gmail.com>
-Date: Mon, 1 Jul 2019 15:01:21 -0400
-Subject: [PATCH] Use $TMPDIR if available
-
-NixOS sandboxed builds (at least on Mac) don't have access to /tmp,
-and this should be better POSIX.
----
- bin/9c | 2 +-
- bin/9l | 2 +-
- 2 files changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/bin/9c b/bin/9c
-index 3ffb716c..88c47887 100755
---- a/bin/9c
-+++ b/bin/9c
-@@ -133,7 +133,7 @@ case "$tag" in
- esac
- 
- # N.B. Must use temp file to avoid pipe; pipe loses status.
--xtmp=/tmp/9c.$$.$USER.out
-+xtmp=${TMPDIR-/tmp}/9c.$$.$USER.out
- $cc -DPLAN9PORT -I$PLAN9/include $cflags "$@" 2>$xtmp
- status=$?
- quiet $xtmp
-diff --git a/bin/9l b/bin/9l
-index 6195815f..717a540a 100755
---- a/bin/9l
-+++ b/bin/9l
-@@ -346,7 +346,7 @@ then
- 	echo $ld -L$PLAN9/lib "$@" $libsl $extralibs $frameworks
- fi
- 
--xtmp=/tmp/9l.$$.$USER.out
-+xtmp="${TMPDIR-/tmp}/9l.$$.$USER.out"
- xxout() {
- 	sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . | 
- 	egrep -v 'is (often|almost always) misused|is dangerous, better use|text-based stub' 
--- 
-2.21.0
-