diff --git a/Tcl/build b/Tcl/build
index 2f7bab6..59d3536 100755
--- a/Tcl/build
+++ b/Tcl/build
@@ -1,5 +1,6 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="ftp://ftp.tcl.tk/pub/tcl/tcl8_6/tcl$V-src.tar.gz"
 pbuild::configure() {
 	case ${OS} in
 	Linux )
diff --git a/bash/build b/bash/build
index 27e258a..aade8e5 100755
--- a/bash/build
+++ b/bash/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="https://ftp.gnu.org/gnu/$P/$P-$V.tar.gz"
+
 pbuild::configure() {
 	"${MODULE_SRCDIR}"/configure \
 		--prefix="${PREFIX}" \
diff --git a/coreutils/build b/coreutils/build
index ed5e87a..b4d3dd3 100755
--- a/coreutils/build
+++ b/coreutils/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="http://ftp.gnu.org/gnu/coreutils/$P-$V.tar.xz"
+
 pbuild::configure() {
     "${MODULE_SRCDIR}"/configure \
 		      --prefix="${PREFIX}" \
diff --git a/dialog/build b/dialog/build
index 27e258a..4340324 100755
--- a/dialog/build
+++ b/dialog/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="ftp://invisible-island.net/$P/$P-$V.tgz"
+
 pbuild::configure() {
 	"${MODULE_SRCDIR}"/configure \
 		--prefix="${PREFIX}" \
diff --git a/gettext/build b/gettext/build
index c859d43..b86c151 100755
--- a/gettext/build
+++ b/gettext/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="https://ftp.gnu.org/pub/gnu/$P/$P-$V.tar.xz"
+
 pbuild::configure() {
     "${MODULE_SRCDIR}"/configure \
 		      --prefix="${PREFIX}" \