diff --git a/Formula/fsh.rb b/Formula/fsh.rb
index ce8678c66e8..8e7cf824589 100644
--- a/Formula/fsh.rb
+++ b/Formula/fsh.rb
@@ -13,9 +13,8 @@ class Fsh <Formula
     system "make install"
     
     cd bin do
-      inreplace "fsh", "#! /usr/local/bin/python", "#!/usr/bin/env python"
-      inreplace "fshd", "#! /usr/local/bin/python", "#!/usr/bin/env python"
-      inreplace "in.fshd", "#! /usr/local/bin/python", "#!/usr/bin/env python"
+      inreplace ["fsh", "fshd", "in.fshd"],
+        "#! /usr/local/bin/python", "#!/usr/bin/env python"
     end
   end
 end
diff --git a/Formula/glib.rb b/Formula/glib.rb
index 7f1ee6048d9..0930efa50c8 100644
--- a/Formula/glib.rb
+++ b/Formula/glib.rb
@@ -44,20 +44,19 @@ class Glib <Formula
     system "make"
     system "make install"
 
-    # this sucks, basically gettext is Keg only to prevent conflicts with
-    # the wider system, but pkg-config or glib is not smart enough to
-    # have determined that libintl.dylib isn't in the DYLIB_PATH so we have
-    # to add it manually, we might have to do this a lot, so clearly we need
-    # to make it automatic or solve the BSD/GNU gettext conflict in another
-    # way
-    gettext = Formula.factory 'gettext'
-    inreplace lib+'pkgconfig'+'glib-2.0.pc',
-              'Libs: -L${libdir} -lglib-2.0 -lintl',
+    # This sucks; gettext is Keg only to prevent conflicts with the wider
+    # system, but pkg-config or glib is not smart enough to have determined
+    # that libintl.dylib isn't in the DYLIB_PATH so we have to add it
+    # manually.
+    gettext = Formula.factory('gettext')
+    inreplace lib+'pkgconfig/glib-2.0.pc' do |s|
+      s.gsub! 'Libs: -L${libdir} -lglib-2.0 -lintl',
               "Libs: -L${libdir} -lglib-2.0 -L#{gettext.lib} -lintl"
-    inreplace lib+'pkgconfig'+'glib-2.0.pc',
-              'Cflags: -I${includedir}/glib-2.0 -I${libdir}/glib-2.0/include',
+      
+      s.gsub! 'Cflags: -I${includedir}/glib-2.0 -I${libdir}/glib-2.0/include',
               "Cflags: -I${includedir}/glib-2.0 -I${libdir}/glib-2.0/include -I#{gettext.include}"
+    end
 
-    (prefix+'share'+'gtk-doc').rmtree
+    (prefix+'share/gtk-doc').rmtree
   end
 end
diff --git a/Formula/grc.rb b/Formula/grc.rb
index 0d474ccbd2c..293b13b0698 100644
--- a/Formula/grc.rb
+++ b/Formula/grc.rb
@@ -8,10 +8,8 @@ class Grc <Formula
 
   def install
     #TODO we should deprefixify since it's python and thus possible
-    inreplace 'grc', '/etc', etc
-    inreplace 'grc.1', '/etc', etc
-    inreplace 'grcat', '/usr/local', prefix
-    inreplace 'grcat.1', '/usr/local', prefix
+    inreplace ['grc', 'grc.1'], '/etc', etc
+    inreplace ['grcat', 'grcat.1'], '/usr/local', prefix
     
     etc.install 'grc.conf'
     bin.install %w[grc grcat]
diff --git a/Formula/grep.rb b/Formula/grep.rb
index 7dd4d0afa72..d4c204a8a7e 100644
--- a/Formula/grep.rb
+++ b/Formula/grep.rb
@@ -9,14 +9,17 @@ class Grep <Formula
   depends_on 'pcre'
 
   def install
-    system "./configure", "--prefix=#{prefix}", "--disable-debug",
+    system "./configure", "--disable-debug",
                           "--disable-dependency-tracking",
                           "--disable-nls",
+                          "--prefix=#{prefix}",
                           "--infodir=#{info}",
                           "--mandir=#{man}"
 
     # Configure gives me 2 copies of -lpcre and no -lintl, so fix that
-    inreplace "src/Makefile", /^LIBS = .*$/, "LIBS = -lintl  -lpcre"
+    inreplace "src/Makefile" do |s|
+      s.change_make_var! "LIBS", "-lintl -lpcre"
+    end
 
     system "make"
     system "make install"
diff --git a/Formula/io.rb b/Formula/io.rb
index fed4300ad88..7b80413b0d6 100644
--- a/Formula/io.rb
+++ b/Formula/io.rb
@@ -33,10 +33,10 @@ class Io <Formula
   end
 
   def install
-    inreplace 'addons/SGML/build.io', 'sudo ', ''
-    inreplace 'addons/TagDB/build.io', 'sudo ', ''
+    inreplace ['addons/SGML/build.io', 'addons/TagDB/build.io'],
+      'sudo ', ''
 
-    hardcoded_prefixes.each{ |fn| inreplace fn, '/usr/local', prefix }
+    inreplace hardcoded_prefixes, '/usr/local', prefix
 
     system "make vm"
     system "make"
diff --git a/Formula/iodine.rb b/Formula/iodine.rb
index 387d6fc3d63..9d2e5f9b522 100644
--- a/Formula/iodine.rb
+++ b/Formula/iodine.rb
@@ -7,9 +7,8 @@ class Iodine <Formula
 
   def install
     if MACOS_VERSION >= 10.6
-      ["src/common.c", "src/dns.c", "src/iodine.c", "src/iodined.c"].each do |filename|
-        inreplace filename, "arpa/nameser8_compat", "arpa/nameser_compat"
-      end
+      inreplace ["src/common.c", "src/dns.c", "src/iodine.c", "src/iodined.c"],
+        "arpa/nameser8_compat", "arpa/nameser_compat"
     end
 
     system "make install prefix=#{prefix}"
diff --git a/Formula/lua.rb b/Formula/lua.rb
index ad92b0725d8..f3174d3a6fb 100644
--- a/Formula/lua.rb
+++ b/Formula/lua.rb
@@ -10,12 +10,12 @@ class Lua <Formula
   end
 
   def install
-    inreplace 'Makefile', '/usr/local', prefix
-    inreplace 'src/luaconf.h', '/usr/local', prefix
-    inreplace 'etc/lua.pc', '/usr/local', prefix
+    inreplace ['Makefile', 'src/luaconf.h', 'etc/lua.pc'],
+      '/usr/local', prefix
+
+    inreplace ['Makefile', 'etc/lua.pc'],
+      'man/man1', 'share/man/man1'
 
-    inreplace 'Makefile', 'man/man1', 'share/man/man1'
-    inreplace 'etc/lua.pc', 'man/man1', 'share/man/man1'
     inreplace 'src/luaconf.h', '/usr/local', HOMEBREW_PREFIX
 
     ENV.append "CFLAGS", "-DLUA_USE_LINUX"
diff --git a/Formula/mpg123.rb b/Formula/mpg123.rb
index 6d2bdae90f8..18e060f4e81 100644
--- a/Formula/mpg123.rb
+++ b/Formula/mpg123.rb
@@ -28,13 +28,11 @@ class Mpg123 <Formula
     system "./configure", *args
     
     # ./configure incorrectly detects 10.5 as 10.4. Cut that crap out.
-    ['', 'src/', 'src/output/', 'src/libmpg123/'].each do |path|
-      inreplace "#{path}Makefile", # CFLAGS
-        "-mmacosx-version-min=10.4 -isysroot /Developer/SDKs/MacOSX10.4u.sdk", ""
-
-      inreplace "#{path}Makefile", # LDFLAGS
-        "LDFLAGS =  -Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk -Wl,-classic_linker -Wl,-read_only_relocs,suppress", 
-        "LDFLAGS =  -Wl,-read_only_relocs,suppress"
+    ['.', 'src', 'src/output', 'src/libmpg123'].each do |path|
+      inreplace "#{path}/Makefile" do |s|
+        s.gsub! "-mmacosx-version-min=10.4 -isysroot /Developer/SDKs/MacOSX10.4u.sdk", ""
+        s.change_make_var! "LDFLAGS", "-Wl,-read_only_relocs,suppress"
+      end
     end
     
     system "make install"
diff --git a/Formula/omega.rb b/Formula/omega.rb
index add68fc071b..2a9a30c465e 100644
--- a/Formula/omega.rb
+++ b/Formula/omega.rb
@@ -6,23 +6,21 @@ class Omega <Formula
   @md5='6d65ec9e0cc87ccf89ab491533ec4b77'
 
   def install
-    # 'make install' is weird, so we do it ourselves
-    
     # Set up our target folders
     inreplace "defs.h", "#define OMEGALIB \"./omegalib/\"", "#define OMEGALIB \"#{libexec}/\""
 
-    # Don't alias CC this way; also, don't need that ncurses include path
-    inreplace "Makefile", "CC = gcc -I/usr/include/ncurses", ""
-
+    # Don't alias CC; also, don't need that ncurses include path
     # Set the system type in CFLAGS, not in makefile
-    inreplace "Makefile", "CFLAGS = -DUNIX -DSYSV -O", ""
-    ENV['CFLAGS'] = ENV['CFLAGS'] + " -DUNIX -DSYSV"
-
     # Remove an obsolete flag
-    inreplace "Makefile", "LDFLAGS = -s", ""
+    inreplace "Makefile" do |s|
+      s.remove_make_var! ['CC', 'CFLAGS', 'LDFLAGS']
+    end
     
+    ENV.append_to_cflags "-DUNIX -DSYSV"
+
     system "make"
 
+    # 'make install' is weird, so we do it ourselves
     bin.install "omega"
     libexec.install Dir['omegalib/*']
   end
diff --git a/Formula/optipng.rb b/Formula/optipng.rb
index fa1e4a92ece..ea3eaf1deb9 100644
--- a/Formula/optipng.rb
+++ b/Formula/optipng.rb
@@ -6,8 +6,10 @@ class Optipng <Formula
   md5 '6cef405197a878acff4c6216cf38e871'
 
   def install
-    inreplace 'src/scripts/gcc.mak.in', '/usr/local', prefix
-    inreplace 'src/scripts/gcc.mak.in', 'mandir=$(prefix)/man', 'mandir=$(prefix)/share/man'
+    inreplace 'src/scripts/gcc.mak.in' do |s|
+      s.gsub! '/usr/local', prefix
+      s.change_make_var! 'mandir', man
+    end
     system "./configure", "-with-system-zlib"
     system "make install"
   end
diff --git a/Formula/sdl.rb b/Formula/sdl.rb
index 275d28daeab..f71cdde6490 100644
--- a/Formula/sdl.rb
+++ b/Formula/sdl.rb
@@ -9,7 +9,7 @@ class Sdl <Formula
   # are installed to the same prefix. Consequently SDL stuff cannot be
   # keg-only but I doubt that will be needed.
   def self.use_homebrew_prefix files
-    files.each {|f| inreplace f, '@prefix@', HOMEBREW_PREFIX}
+    inreplace files, '@prefix@', HOMEBREW_PREFIX
   end
 
   def install
diff --git a/Formula/shapefile.rb b/Formula/shapefile.rb
index a7dbf8e0665..5d53507a81c 100644
--- a/Formula/shapefile.rb
+++ b/Formula/shapefile.rb
@@ -8,7 +8,9 @@ class Shapefile <Formula
   def install
     dylib = lib+"libshp.#{version}.dylib"
 
-    inreplace 'Makefile', /CFLAGS\s+=\s+-g/, "CFLAGS = #{ENV['CFLAGS']}"
+    inreplace 'Makefile' do |s|
+      s.change_make_var! "CFLAGS", ENV['CFLAGS']
+    end
 
     system "make all"
     system "make shptree.o"
@@ -22,8 +24,9 @@ class Shapefile <Formula
 
     include.install 'shapefil.h'
 
-    Dir.chdir lib
-    FileUtils.ln_s "libshp.#{version}.dylib", "libshp.#{version.split('.').first}.dylib"
-    FileUtils.ln_s "libshp.#{version}.dylib", "libshp.dylib"
+    Dir.chdir lib do
+      FileUtils.ln_s "libshp.#{version}.dylib", "libshp.#{version.split('.').first}.dylib"
+      FileUtils.ln_s "libshp.#{version}.dylib", "libshp.dylib"
+    end
   end
 end
diff --git a/Formula/xspringies.rb b/Formula/xspringies.rb
index 3668a86962e..9de783b4d42 100644
--- a/Formula/xspringies.rb
+++ b/Formula/xspringies.rb
@@ -7,8 +7,10 @@ class Xspringies <Formula
   version '1.12'
 
   def install
-    inreplace 'Makefile.std', 'LIBS = -lm -lX11', 'LIBS = -L/usr/X11/lib -lm -lX11'
-    inreplace 'Makefile.std', 'mkdirhier', 'mkdir -p'
+    inreplace 'Makefile.std' do |s|
+      s.change_make_var! "LIBS", '-L/usr/X11/lib -lm -lX11'
+      s.gsub! 'mkdirhier', 'mkdir -p'
+    end
     system "make -f Makefile.std DDIR=#{prefix}/ install"
   end
 end
diff --git a/Formula/zsh.rb b/Formula/zsh.rb
index af5d39dd7b0..b97acf82e29 100644
--- a/Formula/zsh.rb
+++ b/Formula/zsh.rb
@@ -13,10 +13,9 @@ class Zsh <Formula
                           "--enable-fndir=#{share}/zsh/functions",
                           "--enable-scriptdir=#{share}/zsh/scripts"
 
-    # again don't version installation directories
-    [".", "Src"].each do |f|
-      inreplace "#{f}/Makefile", "$(libdir)/$(tzsh)/$(VERSION)", "$(libdir)"
-    end
+    # Again, don't version installation directories
+    inreplace ["Makefile", "Src/Makefile"],
+      "$(libdir)/$(tzsh)/$(VERSION)", "$(libdir)"
 
     system "make install"
   end