diff --git a/pkgs/applications/misc/procmail/default.nix b/pkgs/applications/misc/procmail/default.nix
index 50767a7dde80..8246f7522d63 100644
--- a/pkgs/applications/misc/procmail/default.nix
+++ b/pkgs/applications/misc/procmail/default.nix
@@ -1,18 +1,21 @@
 args: with args;
 stdenv.mkDerivation {
   name="procmail-3.22";
-  buildInputs = [stdenv.gcc.libc];
+
+  buildInputs = [ stdenv.gcc.libc ];
+
   installPhase = "
     ensureDir \$out/bin
-    find . -exec sed -e \"s%^RM[ \\t]*=%RM=`type -f rm | awk '{print $3;}'`%\" -i '{}' ';'
-    sed -e 's%\\(LDFLAGS = \$(LDFLAGS1) -lnsl -ldl -lc\\)%\\1 -m%' -i src/Makefile
+    sed -e \"s%^RM.*$%RM=`type -f rm | awk '{print $3;}'` -f%\" -i Makefile
     sed -e \"s%^BASENAME.*%\BASENAME=$out%\" -i Makefile
+    sed -e \"s%^LIBS=.*%LIBS=-lm%\" -i Makefile
     make DESTDIR=\$out install
    ";
-  phases ="installPhase";
+
+  phases = "unpackPhase installPhase";
+
   src = fetchurl {
     url = ftp://ftp.fu-berlin.de/pub/unix/mail/procmail/procmail-3.22.tar.gz;
     sha256 = "05z1c803n5cppkcq99vkyd5myff904lf9sdgynfqngfk9nrpaz08";
   };
-  o=62;
 }