diff --git a/tcl-8.6.8-0.build.sh b/tcl-8.6.8-0.build.sh
new file mode 100755
index 0000000..51b53ae
--- /dev/null
+++ b/tcl-8.6.8-0.build.sh
@@ -0,0 +1,61 @@
+#! /bin/bash
+
+PKG=tcl
+VERSION=8.6.8
+BUILD=0
+
+PREFIX=/pkg/$PKG-$VERSION-$BUILD
+#PREFIX=/dev/shm/$PKG-$VERSION-$BUILD
+
+set -xe
+umask 022
+
+BUILD_TMPDIR=/dev/shm/$PKG-$VERSION-$BUILD.build.tmp
+test -d $BUILD_TMPDIR && rm -rf $BUILD_TMPDIR
+mkdir -p $BUILD_TMPDIR/home
+export TMPDIR=$BUILD_TMPDIR
+export HOME=$BUILD_TMPDIR/home
+
+exec </dev/null
+
+mkdir -p $PREFIX
+cat >$PREFIX/profile <<-EOF
+	PATH=$PREFIX/bin:\$PATH
+EOF
+. $PREFIX/profile
+
+export MAKEFLAGS="-j $(nproc)"
+
+BUILDDIR=$PREFIX/build
+
+mkdir -p $BUILDDIR
+cd $BUILDDIR
+
+test -e tcl$VERSION-src.tar.gz || wget https://prdownloads.sourceforge.net/tcl/tcl$VERSION-src.tar.gz
+test -d tcl$VERSION        || tar xf tcl$VERSION-src.tar.gz
+test -e tk$VERSION-src.tar.gz || wget https://prdownloads.sourceforge.net/tcl/tk$VERSION-src.tar.gz
+test -d tk$VERSION         || tar xf tk$VERSION-src.tar.gz
+
+(
+    cd $BUILDDIR/tcl$VERSION/unix
+    ./configure --prefix=$PREFIX
+    make -j $(nproc)
+    make test
+    make install
+)
+
+(
+    cd $BUILDDIR/tk$VERSION/unix
+    ./configure --prefix=$PREFIX  --with-tcl=$BUILDDIR/tcl$VERSION/unix
+    make -j $(nproc)
+    # make test # disable tests. require display
+    make install
+)
+
+(
+    cd $PREFIX/bin;
+    ln -s tclsh[0-9]* tclsh
+    ln -s iwish[0-9]* wish
+}
+
+exit