3 files changed, 35 insertions, 18 deletions
diff --git a/extra/devtools/PKGBUILD b/extra/devtools/PKGBUILD
index 19bd31a0..37f0da9d 100644
--- a/extra/devtools/PKGBUILD
+++ b/extra/devtools/PKGBUILD
@@ -17,14 +17,20 @@ unset b2sums
 
 makedepends+=('asciidoc')
 
-prepare() {
-  cd "${srcdir}/${pkgname}32-v${pkgver}"
-  sed -i '
-    s,\$working_dir/etc/pacman\.d/mirrorlist32,/dev/null,
-    s/mirrorlist32/mirrorlist/g
-  ' 'arch-nspawn.in'
-  sed -i 's@s,/mirrorlist\\\$\$,\\032,;\?@@' 'Makefile'
-}
+eval "$(
+  {
+    declare -f prepare || \
+    printf 'prepare() {\n}\n'
+  } \
+  | sed '
+    $i cd "${srcdir}/${pkgname}32-v${pkgver}" \
+       sed -i '"'"' \
+         s,\$working_dir/etc/pacman\.d/mirrorlist32,/dev/null, \
+         s/mirrorlist32/mirrorlist/g \
+       '"'"' '"'"'arch-nspawn.in'"'"' \
+       sed -i '"'"'s@s,/mirrorlist\\\$\$,\\032,;\?@@'"'"' '"'"'Makefile'"'"'
+  '
+)"
 
 eval "$(
   declare -f prepare build check package | \
diff --git a/extra/mutter/PKGBUILD b/extra/mutter/PKGBUILD
index 60ceb6fa..8a8a4f44 100644
--- a/extra/mutter/PKGBUILD
+++ b/extra/mutter/PKGBUILD
@@ -9,9 +9,14 @@ eval "$(
 source+=(fix-build.diff)
 sha256sums+=('28aa24daed161f2566ca2b159beb43285184c533956b851a7eb318de741da935')
 
-prepare() {
-  cd $pkgname
-
-  # fix build with libglvnd's EGL headers
-  git apply -3 ../fix-build.diff
-}
+eval "$(
+  {
+    declare -f prepare || \
+    printf 'prepare() {\n}\n'
+  } \
+  | sed '
+    $i cd "$srcdir/$pkgname" \
+       # fix build with libglvnd's EGL headers \
+       git apply -3 ../fix-build.diff
+  '
+)"
diff --git a/extra/xfce4-diskperf-plugin/PKGBUILD b/extra/xfce4-diskperf-plugin/PKGBUILD
index f42f1cb5..74532d0b 100644
--- a/extra/xfce4-diskperf-plugin/PKGBUILD
+++ b/extra/xfce4-diskperf-plugin/PKGBUILD
@@ -1,5 +1,11 @@
 # see https://bugs.archlinux.org/task/60632
-prepare() {
-  cd $pkgname-$pkgver
-  sed -i '/#include <sys\/types.h>/ a #include <sys\/sysmacros.h>/' panel-plugin/devperf.c 
-}
+eval "$(
+  {
+    declare -f prepare || \
+    printf 'prepare() {\n}\n'
+  } \
+  | sed '
+    $ i cd "$srcdir/$pkgname-$pkgver"\
+        sed -i '"'"'/#include <sys\/types.h>/ a #include <sys\/sysmacros.h>/'"'"' panel-plugin/devperf.c
+  '
+)"