diff --git a/crew b/crew
index 6c07d4381..4f2be5df2 100755
--- a/crew
+++ b/crew
@@ -15,6 +15,8 @@ CREW_CONFIG_PATH = CREW_PREFIX + '/etc/crew/'
 CREW_BREW_DIR = CREW_PREFIX + '/tmp/crew/'
 CREW_DEST_DIR = CREW_BREW_DIR + '/dest'
 
+SHORTARCH = `getconf LONG_BIT | tr -d '\n\r'`
+
 $LOAD_PATH.unshift "#{CREW_LIB_PATH}lib"
 
 USER = `whoami`.chomp
diff --git a/packages/bc.rb b/packages/bc.rb
index ecfc51b48..3e39e02d8 100644
--- a/packages/bc.rb
+++ b/packages/bc.rb
@@ -8,7 +8,7 @@ class Bc < Package
   depends_on 'flex'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/"
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/"
     system "make"
   end
 
diff --git a/packages/clisp.rb b/packages/clisp.rb
index dc642b588..4e85941fd 100644
--- a/packages/clisp.rb
+++ b/packages/clisp.rb
@@ -9,7 +9,7 @@ class Clisp < Package
   depends_on 'ffcall'
 
   def self.build
-    system "./configure CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     FileUtils.cd('src') do
       system "ulimit -s 16384"
       system "make"
diff --git a/packages/ffcall.rb b/packages/ffcall.rb
index e442f27c9..8f241a89d 100644
--- a/packages/ffcall.rb
+++ b/packages/ffcall.rb
@@ -6,7 +6,7 @@ class Ffcall < Package
   source_sha1 '6b4fdc7bd38b434bbf3d65508a3d117fc8b349f3'
 
   def self.build
-    system "./configure --prefix=/usr/local --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure --prefix=/usr/local --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     system "make"
   end
 
diff --git a/packages/flex.rb b/packages/flex.rb
index c8154ee15..32eb7dc3b 100644
--- a/packages/flex.rb
+++ b/packages/flex.rb
@@ -8,7 +8,7 @@ class Flex < Package
   depends_on 'm4'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     system "make"
   end
 
diff --git a/packages/fontconfig.rb b/packages/fontconfig.rb
index 0d3554e0e..2fd8ac6c8 100644
--- a/packages/fontconfig.rb
+++ b/packages/fontconfig.rb
@@ -8,7 +8,7 @@ class Fontconfig < Package
   depends_on 'pkgconfig'
 
   def self.build
-      system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+      system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
       system "make"
   end
 
diff --git a/packages/freetype.rb b/packages/freetype.rb
index dd036b3ca..e472eaa50 100644
--- a/packages/freetype.rb
+++ b/packages/freetype.rb
@@ -6,7 +6,7 @@ class Freetype < Package
   source_sha1 '12dd3267af62cccc32045ed99984f3d8a8ddbf90'
 
   def self.build
-      system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+      system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
       system "make"
   end
 
diff --git a/packages/gdal.rb b/packages/gdal.rb
index 81c95b157..622179c3a 100644
--- a/packages/gdal.rb
+++ b/packages/gdal.rb
@@ -12,7 +12,7 @@ class Gdal < Package
   depends_on 'libxml2'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\" --with-png=internal --with-libtiff=internal --with-geotiff=internal --with-jpeg=internal --with-gif=internal --with-curl=/usr/local/bin/curl-config --with-geos=/usr/local/bin/geos-config --with-static-proj4=/usr/local/share/proj --with-python"
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\" --with-png=internal --with-libtiff=internal --with-geotiff=internal --with-jpeg=internal --with-gif=internal --with-curl=/usr/local/bin/curl-config --with-geos=/usr/local/bin/geos-config --with-static-proj4=/usr/local/share/proj --with-python"
     system "make"
   end
 
diff --git a/packages/geos.rb b/packages/geos.rb
index 9e7514046..3d2b25f6b 100644
--- a/packages/geos.rb
+++ b/packages/geos.rb
@@ -6,7 +6,7 @@ class Geos < Package
   source_sha1 'b8aceab04dd09f4113864f2d12015231bb318e9a'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     system "make"
   end
 
diff --git a/packages/libgd.rb b/packages/libgd.rb
index 2ab85cb38..e47782306 100644
--- a/packages/libgd.rb
+++ b/packages/libgd.rb
@@ -7,7 +7,7 @@ class Libgd < Package
 
   def self.build
     FileUtils.cd('src') do
-      system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+      system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
       system "make"
     end
   end
diff --git a/packages/libjpeg.rb b/packages/libjpeg.rb
index 736261179..fe1ccdbf2 100644
--- a/packages/libjpeg.rb
+++ b/packages/libjpeg.rb
@@ -6,7 +6,7 @@ class Libjpeg < Package
   source_sha1 '7079f0d6c42fad0cfba382cf6ad322add1ace8f9'
 
   def self.build
-    system "./configure --includedir=/usr/local/include --libdir=/usr/local/lib64 CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure --includedir=/usr/local/include --libdir=/usr/local/lib#{SHORTARCH} CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     system "make"
   end
 
diff --git a/packages/libpng.rb b/packages/libpng.rb
index a74fc4041..53aaf950f 100644
--- a/packages/libpng.rb
+++ b/packages/libpng.rb
@@ -6,7 +6,7 @@ class Libpng < Package
   source_sha1 'e912df0826dd6fb74f579ba60bf05c99807548ac'
 
   def self.build
-      system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+      system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
       system "make"
   end
 
diff --git a/packages/libsigsegv.rb b/packages/libsigsegv.rb
index ea240e3a9..d2839d5ea 100644
--- a/packages/libsigsegv.rb
+++ b/packages/libsigsegv.rb
@@ -6,7 +6,7 @@ class Libsigsegv < Package
   source_sha1 'b75a647a9ebda70e7a3b33583efdd550e0eac094'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     system "make"
   end
 
diff --git a/packages/libxml2.rb b/packages/libxml2.rb
index d204ae7a9..373f55638 100644
--- a/packages/libxml2.rb
+++ b/packages/libxml2.rb
@@ -6,7 +6,7 @@ class Libxml2 < Package
   source_sha1 'f46a37ea6d869f702e03f393c376760f3cbee673'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\" --without-python"
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\" --without-python"
     system "make"
   end
 
diff --git a/packages/mapserver.rb b/packages/mapserver.rb
index 5f505800e..6a469a927 100644
--- a/packages/mapserver.rb
+++ b/packages/mapserver.rb
@@ -6,7 +6,7 @@ class Mapserver < Package
   source_sha1 '3f05bf6c9a32b34408e36ddd32f61d68d65cf01c'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\" --with-gdal=/usr/local/bin/gdal-config --with-ogr --with-png --with-jpeg --without-pdf --with-agg --with-proj --with-threads --with-geos=/usr/local/bin/geos-config --with-tiff --with-wfs --with-wmsclient --with-wfsclient --with-curl-config=/usr/local/bin/curl-config --with-xml2-config=/usr/local/bin/xml2-config"
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\" --with-gdal=/usr/local/bin/gdal-config --with-ogr --with-png --with-jpeg --without-pdf --with-agg --with-proj --with-threads --with-geos=/usr/local/bin/geos-config --with-tiff --with-wfs --with-wmsclient --with-wfsclient --with-curl-config=/usr/local/bin/curl-config --with-xml2-config=/usr/local/bin/xml2-config"
     system "make"
   end
 
diff --git a/packages/openconnect.rb b/packages/openconnect.rb
index c54ed236e..94ea1761b 100644
--- a/packages/openconnect.rb
+++ b/packages/openconnect.rb
@@ -36,7 +36,7 @@ class Openconnect < Package
   depends_on 'gnutls'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\" --with-vpnc-script=/usr/local/etc/vpnc/vpnc-script"
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\" --with-vpnc-script=/usr/local/etc/vpnc/vpnc-script"
     system "make"
   end
 
diff --git a/packages/pkgconfig.rb b/packages/pkgconfig.rb
index 1fa39097f..f36d01e6a 100644
--- a/packages/pkgconfig.rb
+++ b/packages/pkgconfig.rb
@@ -8,7 +8,7 @@ class Pkgconfig < Package
   depends_on 'buildessential'
 
   def self.build
-      system "./configure --with-internal-glib --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+      system "./configure --with-internal-glib --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
       system "make"
   end
 
diff --git a/packages/proj4.rb b/packages/proj4.rb
index 5ad607ddf..ca9ce7185 100644
--- a/packages/proj4.rb
+++ b/packages/proj4.rb
@@ -6,7 +6,7 @@ class Proj4 < Package
   source_sha1 '0bc63a41f1bdcff600d076c056f796007abf3f2f'
 
   def self.build
-    system "./configure --libdir=/usr/local/lib64/ CC=\"gcc -m64\" CFLAGS=\" -fPIC\""
+    system "./configure --libdir=/usr/local/lib#{SHORTARCH}/ CC=\"gcc -m#{SHORTARCH}\" CFLAGS=\" -fPIC\""
     system "make"
   end