diff --git a/recipes/c_igraph/recipe.sh b/recipes/c_igraph/recipe.sh
index 02697b8e5d..854671a305 100644
--- a/recipes/c_igraph/recipe.sh
+++ b/recipes/c_igraph/recipe.sh
@@ -19,7 +19,14 @@ BUILD_c_igraph=$BUILD_PATH/c_igraph/$(get_directory $URL_c_igraph)
 RECIPE_c_igraph=$RECIPES_PATH/c_igraph
 
 function prebuild_c_igraph() {
-    true
+    if [ ! -e $BUILD_c_igraph/.patched ]; then {
+            try patch $BUILD_c_igraph/src/Makefile.am $RECIPE_c_igraph/Makefile.am.patch;
+            try cp -f $RECIPE_c_igraph/arith.h $BUILD_c_igraph/src/f2c/arith.h;
+            try patch $BUILD_c_igraph/src/f2c/sysdep1.h $RECIPE_c_igraph/sysdep1.h.patch;
+            try patch $BUILD_c_igraph/src/f2c/uninit.c $RECIPE_c_igraph/uninit.c.patch;
+            touch $BUILD_c_igraph/.patched;
+        }
+    fi
 }
 
 function shouldbuild_c_igraph() {
@@ -32,15 +39,15 @@ function build_c_igraph() {
     cd $BUILD_c_igraph
 
     push_arm
-    try patch $BUILD_c_igraph/src/Makefile.am $RECIPE_c_igraph/Makefile.am.patch
-    export OLD_CPPFLAGS="$CPPFLAGS"
-    export CPPFLAGS="$CPPFLAGS -I$ANDROIDNDK/sources/cxx-stl/gnu-libstdc++/4.4.3/include -I$ANDROIDNDK/sources/cxx-stl/gnu-libstdc++/4.4.3/libs/armeabi/include -L$ANDROIDNDK/platforms/android-$ANDROIDAPI/arch-arm/usr/lib"
-    try ./configure --prefix="$BUILD_PATH/python-install" --build=i686-pc-linux-gnu --host=arm-linux-eabi
-    export CPPFLAGS="$OLD_CPPFLAGS"
-    try cp -f $RECIPE_c_igraph/arith.h $BUILD_c_igraph/src/f2c/arith.h
-    try patch $BUILD_c_igraph/src/f2c/sysdep1.h $RECIPE_c_igraph/sysdep1.h.patch
-    try patch $BUILD_c_igraph/src/f2c/uninit.c $RECIPE_c_igraph/uninit.c.patch
-    try patch $BUILD_c_igraph/config.h $RECIPE_c_igraph/config.h.patch
+    if [ ! -e $BUILD_c_igraph/config.h ]; then
+        export OLD_CPPFLAGS="$CPPFLAGS";
+        export CPPFLAGS="$CPPFLAGS -I$ANDROIDNDK/sources/cxx-stl/gnu-libstdc++/4.4.3/include -I$ANDROIDNDK/sources/cxx-stl/gnu-libstdc++/4.4.3/libs/armeabi/include -L$ANDROIDNDK/platforms/android-$ANDROIDAPI/arch-arm/usr/lib";
+        try ./configure --prefix="$BUILD_PATH/python-install" --build=i686-pc-linux-gnu --host=arm-linux-eabi;
+        try patch $BUILD_c_igraph/config.h $RECIPE_c_igraph/config.h.patch;
+        export CPPFLAGS="$OLD_CPPFLAGS";
+    fi
+
+
     try $MAKE
     try $MAKE install
 
diff --git a/recipes/igraph/recipe.sh b/recipes/igraph/recipe.sh
index 942fe0a5fd..6d87611c6d 100644
--- a/recipes/igraph/recipe.sh
+++ b/recipes/igraph/recipe.sh
@@ -1,4 +1,4 @@
-b#!/bin/bash
+#!/bin/bash
 
 # Recipe for the Python interface to igraph, a high-performance graph library in C: http://igraph.org/
 #
@@ -18,7 +18,11 @@ RECIPE_igraph=$RECIPES_PATH/igraph
 
 
 function prebuild_igraph() {
-    true
+    if [ ! -f "$BUILD_igraph/.patched" ]; then
+        try patch $BUILD_igraph/setup.py $RECIPE_igraph/setup.py.patch
+        try patch $BUILD_igraph/setup.cfg $RECIPE_igraph/setup.cfg.patch
+        touch $BUILD_igraph/.patched
+    fi
 }
 
 function shouldbuild_igraph() {
@@ -29,8 +33,6 @@ function shouldbuild_igraph() {
 
 function build_igraph() {
     cd $BUILD_igraph
-    patch setup.py $RECIPE_igraph/setup.py.patch
-    patch setup.cfg $RECIPE_igraph/setup.cfg.patch
     push_arm
 
     try $HOSTPYTHON setup.py build_ext -I"$BUILD_PATH/python-install/include/igraph:$ANDROIDNDK/sources/cxx-stl/gnu-libstdc++/4.4.3/libs/armeabi/include" -L"$BUILD_PATH/python-install/lib:$ANDROIDNDK/sources/cxx-stl/gnu-libstdc++/4.4.3/libs/armeabi" -l gnustl_static -p arm-gnueabi install