diff --git a/packages/parallel/build.sh b/packages/parallel/build.sh
index d6d533c1c..661aa5dc0 100644
--- a/packages/parallel/build.sh
+++ b/packages/parallel/build.sh
@@ -1,6 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://www.gnu.org/software/parallel/
 TERMUX_PKG_DESCRIPTION="GNU Parallel is a shell tool for executing jobs in parallel using one or more machines"
 TERMUX_PKG_VERSION=20180222
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SHA256=e81997dbabef18708de30635bd5d05af63395d869452a91c6a047c9c590e9daf
 TERMUX_PKG_SRCURL=https://mirrors.kernel.org/gnu/parallel/parallel-${TERMUX_PKG_VERSION}.tar.bz2
 TERMUX_PKG_DEPENDS="perl"
diff --git a/packages/parallel/parallel.patch b/packages/parallel/parallel.patch
index 5f89ace50..d1c66dd92 100644
--- a/packages/parallel/parallel.patch
+++ b/packages/parallel/parallel.patch
@@ -1,7 +1,16 @@
-diff -u -r ../parallel-20160922/src/parallel ./src/parallel
---- ../parallel-20160922/src/parallel	2016-09-22 19:04:53.000000000 -0400
-+++ ./src/parallel	2016-09-26 10:01:43.814429837 -0400
-@@ -1258,11 +1258,11 @@
+diff -uNr parallel-20180222/src/parallel parallel-20180222.mod/src/parallel
+--- parallel-20180222/src/parallel	2018-02-22 21:42:51.000000000 +0200
++++ parallel-20180222.mod/src/parallel	2018-06-21 12:36:46.066728715 +0300
+@@ -1137,7 +1137,7 @@
+     if($opt::bug) { ::die_bug("test-bug"); }
+     $Global::debug = $opt::D;
+     $Global::shell = $ENV{'PARALLEL_SHELL'} || parent_shell($$)
+-	|| $ENV{'SHELL'} || "/bin/sh";
++	|| $ENV{'SHELL'} || "@TERMUX_PREFIX@/bin/sh";
+     if(not which($Global::shell)) {
+ 	::error("Shell '$Global::shell' not found.");
+ 	wait_and_exit(255);
+@@ -1488,11 +1488,11 @@
      $Global::trim = 'n';
      $Global::max_jobs_running = 0;
      $Global::job_already_run = '';
@@ -14,9 +23,18 @@ diff -u -r ../parallel-20160922/src/parallel ./src/parallel
 +	::warning("\$HOME not set. Using @TERMUX_HOME@.");
 +	$ENV{HOME} = "@TERMUX_HOME@";
      }
- }
+     # no warnings to allow for undefined $XDG_*
+     no warnings 'uninitialized';
+@@ -3411,7 +3411,7 @@
+     unlink $stderrname;
  
-@@ -4255,6 +4255,7 @@
+     my $pid = ::open3($stdin_fh,$stdout_fh,$stderr_fh,
+-		      $0,qw(--plain --shell /bin/sh --will-cite), @args);
++		      $0,qw(--plain --shell @TERMUX_PREFIX@/bin/sh --will-cite), @args);
+     if(my $writerpid = fork()) {
+ 	close $stdin_fh;
+ 	@stdout = <$stdout_fh>;
+@@ -4758,6 +4758,7 @@
  	    my $bsd = q(ps -o pid,ppid,command -ax);
  	    %pid_parentpid_cmd =
  	    (
diff --git a/packages/parallel/sem.patch b/packages/parallel/sem.patch
index a6da3acf8..465f79056 100644
--- a/packages/parallel/sem.patch
+++ b/packages/parallel/sem.patch
@@ -1,7 +1,16 @@
-diff -u -r ../parallel-20160222/src/sem ./src/sem
---- ../parallel-20160222/src/sem	2016-02-21 16:24:56.000000000 -0500
-+++ ./src/sem	2016-04-19 16:51:57.450434076 -0400
-@@ -1224,11 +1224,11 @@
+diff -uNr parallel-20180222/src/sem parallel-20180222.mod/src/sem
+--- parallel-20180222/src/sem	2018-02-22 21:42:51.000000000 +0200
++++ parallel-20180222.mod/src/sem	2018-06-21 12:37:26.333395678 +0300
+@@ -1137,7 +1137,7 @@
+     if($opt::bug) { ::die_bug("test-bug"); }
+     $Global::debug = $opt::D;
+     $Global::shell = $ENV{'PARALLEL_SHELL'} || parent_shell($$)
+-	|| $ENV{'SHELL'} || "/bin/sh";
++	|| $ENV{'SHELL'} || "@TERMUX_PREFIX@/bin/sh";
+     if(not which($Global::shell)) {
+ 	::error("Shell '$Global::shell' not found.");
+ 	wait_and_exit(255);
+@@ -1488,11 +1488,11 @@
      $Global::trim = 'n';
      $Global::max_jobs_running = 0;
      $Global::job_already_run = '';
@@ -14,5 +23,14 @@ diff -u -r ../parallel-20160222/src/sem ./src/sem
 +	::warning("\$HOME not set. Using @TERMUX_HOME@.");
 +	$ENV{HOME} = "@TERMUX_HOME@";
      }
- }
+     # no warnings to allow for undefined $XDG_*
+     no warnings 'uninitialized';
+@@ -3411,7 +3411,7 @@
+     unlink $stderrname;
  
+     my $pid = ::open3($stdin_fh,$stdout_fh,$stderr_fh,
+-		      $0,qw(--plain --shell /bin/sh --will-cite), @args);
++		      $0,qw(--plain --shell @TERMUX_PREFIX@/bin/sh --will-cite), @args);
+     if(my $writerpid = fork()) {
+ 	close $stdin_fh;
+ 	@stdout = <$stdout_fh>;