diff --git a/sysa/perl-5.000/perl-5.000.sh b/sysa/perl-5.000/perl-5.000.sh
index 4342a1d..abd7c9e 100755
--- a/sysa/perl-5.000/perl-5.000.sh
+++ b/sysa/perl-5.000/perl-5.000.sh
@@ -12,22 +12,22 @@ src_prepare() {
     default
 
     # Remove and regenerate bison files
-    rm perly.c perly.h
+    rm -f perly.c perly.h
     bison -d perly.y
     mv perly.tab.c perly.c
     mv perly.tab.h perly.h
 
     # Regenerate embed.h
-    rm embed.h
+    rm -f embed.h
     ./embed_h.SH
 
     # Regenerate keywords.h
-    rm keywords.h
+    rm -f keywords.h
     chmod +x keywords.sh
     ./keywords.sh
 
     # Regenerate opcode.h
-    rm opcode.h
+    rm -f opcode.h
     chmod +x opcode.sh
     ./opcode.sh
 }
diff --git a/sysa/perl-5.003/perl-5.003.sh b/sysa/perl-5.003/perl-5.003.sh
index 594fe67..cb3dc81 100755
--- a/sysa/perl-5.003/perl-5.003.sh
+++ b/sysa/perl-5.003/perl-5.003.sh
@@ -12,14 +12,14 @@ src_prepare() {
     default
 
     # Regenerate bison files
-    rm perly.c perly.h
+    rm -f perly.c perly.h
     bison -d perly.y
     mv perly.tab.c perly.c
     mv perly.tab.h perly.h
 
     # Regenerate other prebuilt header files
     for file in embed keywords opcode; do
-        rm ${file}.h
+        rm -f ${file}.h
         perl ${file}.pl
     done
 }
diff --git a/sysa/perl-5.6.2/perl-5.6.2.sh b/sysa/perl-5.6.2/perl-5.6.2.sh
index 510839f..9167706 100755
--- a/sysa/perl-5.6.2/perl-5.6.2.sh
+++ b/sysa/perl-5.6.2/perl-5.6.2.sh
@@ -7,21 +7,21 @@ src_prepare() {
 
     # Regenerate bison files
     sed -i '/yydestruct/d' perly.y
-    rm perly.c perly.h
+    rm -f perly.c perly.h
     bison -d perly.y
     mv perly.tab.c perly.c
     mv perly.tab.h perly.h
 
     # Regenerate other prebuilt header files
     for file in embed keywords opcode; do
-        rm ${file}.h
+        rm -f ${file}.h
         perl ${file}.pl
     done
-    rm regnodes.h
+    rm -f regnodes.h
     perl regcomp.pl
-    rm ext/ByteLoader/byterun.h ext/ByteLoader/byterun.c
+    rm -f ext/ByteLoader/byterun.h ext/ByteLoader/byterun.c
     perl bytecode.pl
-    rm warnings.h lib/warnings.pm
+    rm -f warnings.h lib/warnings.pm
     perl warnings.pl
 
     # Workaround for some linking problems, remove if possible
diff --git a/sysa/perl5.004_05/perl5.004_05.sh b/sysa/perl5.004_05/perl5.004_05.sh
index 665a8f7..db2217a 100755
--- a/sysa/perl5.004_05/perl5.004_05.sh
+++ b/sysa/perl5.004_05/perl5.004_05.sh
@@ -6,14 +6,14 @@ src_prepare() {
     default
 
     # Regenerate bison files
-    rm perly.c perly.h
+    rm -f perly.c perly.h
     bison -d perly.y
     mv perly.tab.c perly.c
     mv perly.tab.h perly.h
 
     # Regenerate other prebuilt header files
     for file in embed keywords opcode; do
-        rm ${file}.h
+        rm -f ${file}.h
         perl ${file}.pl
     done
 }
diff --git a/sysa/perl5.005_03/perl5.005_03.sh b/sysa/perl5.005_03/perl5.005_03.sh
index ecaa789..2cb00ca 100755
--- a/sysa/perl5.005_03/perl5.005_03.sh
+++ b/sysa/perl5.005_03/perl5.005_03.sh
@@ -6,19 +6,19 @@ src_prepare() {
     default
 
     # Regenerate bison files
-    rm perly.c perly.h
+    rm -f perly.c perly.h
     bison -d perly.y
     mv perly.tab.c perly.c
     mv perly.tab.h perly.h
 
     # Regenerate other prebuilt header files
     for file in embed keywords opcode; do
-        rm ${file}.h
+        rm -f ${file}.h
         perl ${file}.pl
     done
-    rm regnodes.h
+    rm -f regnodes.h
     perl regcomp.pl
-    rm byterun.h byterun.c
+    rm -f fbyterun.h byterun.c
     perl bytecode.pl
 }
 
diff --git a/sysc/perl-5.10.1/perl-5.10.1.sh b/sysc/perl-5.10.1/perl-5.10.1.sh
index d18fbd8..3b99b1e 100755
--- a/sysc/perl-5.10.1/perl-5.10.1.sh
+++ b/sysc/perl-5.10.1/perl-5.10.1.sh
@@ -12,14 +12,14 @@ src_prepare() {
     # is not dependent on perly.y any more.
     perl regen_perly.pl -b bison-2.3
     # Remove the source file so make works.
-    rm perly.y
+    rm -f perly.y
 
     # Regenerate other prebuilt header files
     # Taken from headers of regen scripts
-    rm lib/warnings.pm warnings.h regnodes.h reentr.h reentr.c overload.h \
-        overload.c lib/overload/numbers.pm opcode.h opnames.h pp_proto.h \
-        pp.sym keywords.h embed.h embedvar.h global.sym perlapi.c perlapi.h \
-        proto.h
+    rm -f lib/warnings.pm warnings.h regnodes.h reentr.h reentr.c overload.h \
+          overload.c lib/overload/numbers.pm opcode.h opnames.h pp_proto.h \
+          pp.sym keywords.h embed.h embedvar.h global.sym perlapi.c perlapi.h \
+          proto.h
     perl regen.pl
 
     mkdir -p ext/File ext/Digest ext/Data
diff --git a/sysc/perl-5.32.1/perl-5.32.1.sh b/sysc/perl-5.32.1/perl-5.32.1.sh
index 0f6b4d7..6db3fea 100755
--- a/sysc/perl-5.32.1/perl-5.32.1.sh
+++ b/sysc/perl-5.32.1/perl-5.32.1.sh
@@ -14,15 +14,15 @@ src_prepare() {
 
     # Regenerate other prebuilt header files
     # Taken from headers of regen scripts
-    rm embed.h embedvar.h perlapi.c perlapi.h proto.h mg_names.inc mg_raw.h \
-        mg_vtable.h opcode.h opnames.h pp_proto.h \
-        lib/B/Op_private.pm overload.h overload.inc lib/overload/numbers.pm \
-        reentr.h reentr.c regnodes.h lib/warnings.pm \
-        warnings.h lib/feature.pm feature.h
+    rm -f embed.h embedvar.h perlapi.c perlapi.h proto.h mg_names.inc mg_raw.h \
+          mg_vtable.h opcode.h opnames.h pp_proto.h \
+          lib/B/Op_private.pm overload.h overload.inc lib/overload/numbers.pm \
+          reentr.h reentr.c regnodes.h lib/warnings.pm \
+          warnings.h lib/feature.pm feature.h
     perl regen.pl
 
     # Regenerate configure + config_h.SH
-    rm Configure config_h.SH
+    rm -f Configure config_h.SH
     ln -s ../perl-5f2dc80/regen-configure/.package .
     ln -s ../perl-5f2dc80/regen-configure/U .
     metaconfig -m