diff --git a/patches/gromacs-4.5.7.diff b/patches/gromacs-4.5.7.diff
index 5fd6d46659aec5e7ac397d041e0975ad02d1ea27..1c1adb87277a067f2acf663eeaeb10477329b2f8 100644
--- a/patches/gromacs-4.5.7.diff
+++ b/patches/gromacs-4.5.7.diff
@@ -1,4 +1,4 @@
-patch -u -l -b -F 5 --suffix=.preplumed "./src/kernel/md.c" << \EOF_EOF
+patch -u -l -b -F 5 -N --suffix=.preplumed "./src/kernel/md.c" << \EOF_EOF
 --- ./src/kernel/md.c.preplumed
 +++ ./src/kernel/md.c
 @@ -86,10 +86,16 @@
@@ -183,7 +183,7 @@ patch -u -l -b -F 5 --suffix=.preplumed "./src/kernel/md.c" << \EOF_EOF
          
          if (bTCR)
 EOF_EOF
-patch -u -l -b -F 5 --suffix=.preplumed "./src/kernel/mdrun.c" << \EOF_EOF
+patch -u -l -b -F 5 -N --suffix=.preplumed "./src/kernel/mdrun.c" << \EOF_EOF
 --- ./src/kernel/mdrun.c.preplumed
 +++ ./src/kernel/mdrun.c
 @@ -54,10 +54,16 @@
@@ -269,7 +269,7 @@ patch -u -l -b -F 5 --suffix=.preplumed "./src/kernel/mdrun.c" << \EOF_EOF
    if (MULTIMASTER(cr)) {
        thanx(stderr);
 EOF_EOF
-patch -u -l -b -F 5 --suffix=.preplumed "./src/kernel/repl_ex.c" << \EOF_EOF
+patch -u -l -b -F 5 -N --suffix=.preplumed "./src/kernel/repl_ex.c" << \EOF_EOF
 --- ./src/kernel/repl_ex.c.preplumed
 +++ ./src/kernel/repl_ex.c
 @@ -49,10 +49,16 @@
diff --git a/patches/namd-2.8.diff b/patches/namd-2.8.diff
index 5612e792043d1752d8b1812d935b2d05f18ae311..d1c4f0df25bf5181dc8d643ba53dc7c05649f8f8 100644
--- a/patches/namd-2.8.diff
+++ b/patches/namd-2.8.diff
@@ -1,4 +1,4 @@
-patch -u -l -b -F 5 --suffix=.preplumed "./Makefile" << \EOF_EOF
+patch -u -l -b -F 5 -N --suffix=.preplumed "./Makefile" << \EOF_EOF
 --- ./Makefile.preplumed
 +++ ./Makefile
 @@ -358,10 +358,12 @@
diff --git a/patches/namd-2.9.diff b/patches/namd-2.9.diff
index 73590a2ef9495acea6b6bfb8475c90a3b757370e..8b41a153d5f04ee425e86845c116c6f86c9bdd54 100644
--- a/patches/namd-2.9.diff
+++ b/patches/namd-2.9.diff
@@ -1,4 +1,4 @@
-patch -u -l -b -F 5 --suffix=.preplumed "./Makefile" << \EOF_EOF
+patch -u -l -b -F 5 -N --suffix=.preplumed "./Makefile" << \EOF_EOF
 --- ./Makefile.preplumed
 +++ ./Makefile
 @@ -359,10 +359,12 @@