diff --git a/extra/autoconf/build b/extra/autoconf/build
deleted file mode 100755
index 6daf22f8..00000000
--- a/extra/autoconf/build
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh -e
-
-./configure \
-    --prefix=/usr
-
-make
-make DESTDIR="$1" install
diff --git a/extra/autoconf/checksums b/extra/autoconf/checksums
deleted file mode 100644
index 821d9707..00000000
--- a/extra/autoconf/checksums
+++ /dev/null
@@ -1 +0,0 @@
-954bd69b391edc12d6a4a51a2dd1476543da5c6bbf05a95b59dc0dd6fd4c2969  autoconf-2.69.tar.gz
diff --git a/extra/autoconf/depends b/extra/autoconf/depends
deleted file mode 100644
index 8fd1a89e..00000000
--- a/extra/autoconf/depends
+++ /dev/null
@@ -1,2 +0,0 @@
-m4
-perl
diff --git a/extra/autoconf/sources b/extra/autoconf/sources
deleted file mode 100644
index 399ad44a..00000000
--- a/extra/autoconf/sources
+++ /dev/null
@@ -1 +0,0 @@
-https://ftp.gnu.org/pub/gnu/autoconf/autoconf-2.69.tar.gz
diff --git a/extra/autoconf/version b/extra/autoconf/version
deleted file mode 100644
index 9c78dec0..00000000
--- a/extra/autoconf/version
+++ /dev/null
@@ -1 +0,0 @@
-2.69 2
diff --git a/extra/automake/build b/extra/automake/build
deleted file mode 100755
index 6daf22f8..00000000
--- a/extra/automake/build
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh -e
-
-./configure \
-    --prefix=/usr
-
-make
-make DESTDIR="$1" install
diff --git a/extra/automake/checksums b/extra/automake/checksums
deleted file mode 100644
index 0369191e..00000000
--- a/extra/automake/checksums
+++ /dev/null
@@ -1 +0,0 @@
-608a97523f97db32f1f5d5615c98ca69326ced2054c9f82e65bade7fc4c9dea8  automake-1.16.1.tar.gz
diff --git a/extra/automake/depends b/extra/automake/depends
deleted file mode 100644
index ef9f132a..00000000
--- a/extra/automake/depends
+++ /dev/null
@@ -1,2 +0,0 @@
-autoconf
-perl
diff --git a/extra/automake/sources b/extra/automake/sources
deleted file mode 100644
index 9d75a485..00000000
--- a/extra/automake/sources
+++ /dev/null
@@ -1 +0,0 @@
-https://ftp.gnu.org/gnu/automake/automake-1.16.1.tar.gz
diff --git a/extra/automake/version b/extra/automake/version
deleted file mode 100644
index 541e5c6e..00000000
--- a/extra/automake/version
+++ /dev/null
@@ -1 +0,0 @@
-1.16.1 1
diff --git a/extra/libtool/build b/extra/libtool/build
deleted file mode 100755
index 6daf22f8..00000000
--- a/extra/libtool/build
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh -e
-
-./configure \
-    --prefix=/usr
-
-make
-make DESTDIR="$1" install
diff --git a/extra/libtool/checksums b/extra/libtool/checksums
deleted file mode 100644
index 238a49a3..00000000
--- a/extra/libtool/checksums
+++ /dev/null
@@ -1 +0,0 @@
-7c87a8c2c8c0fc9cd5019e402bed4292462d00a718a7cd5f11218153bf28b26f  libtool-2.4.6.tar.xz
diff --git a/extra/libtool/depends b/extra/libtool/depends
deleted file mode 100644
index 0a3b5170..00000000
--- a/extra/libtool/depends
+++ /dev/null
@@ -1 +0,0 @@
-perl     make
diff --git a/extra/libtool/sources b/extra/libtool/sources
deleted file mode 100644
index 5f32de1a..00000000
--- a/extra/libtool/sources
+++ /dev/null
@@ -1 +0,0 @@
-https://ftp.gnu.org/gnu/libtool/libtool-2.4.6.tar.xz
diff --git a/extra/libtool/version b/extra/libtool/version
deleted file mode 100644
index c2d12dbd..00000000
--- a/extra/libtool/version
+++ /dev/null
@@ -1 +0,0 @@
-2.4.6 1