diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 7a95d718..8f46055e 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-PYTHON_BUILD_VERSION="20140110.1"
+PYTHON_BUILD_VERSION="20140204"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3
@@ -548,6 +548,8 @@ build_package_standard() {
   local PACKAGE_CONFIGURE_OPTS_ARRAY="${package_var_name}_CONFIGURE_OPTS_ARRAY[@]"
   local PACKAGE_MAKE_OPTS="${package_var_name}_MAKE_OPTS"
   local PACKAGE_MAKE_OPTS_ARRAY="${package_var_name}_MAKE_OPTS_ARRAY[@]"
+  local PACKAGE_MAKE_INSTALL_OPTS="${package_var_name}_MAKE_INSTALL_OPTS"
+  local PACKAGE_MAKE_INSTALL_OPTS_ARRAY="${package_var_name}_MAKE_INSTALL_OPTS_ARRAY[@]"
   local PACKAGE_CFLAGS="${package_var_name}_CFLAGS"
 
   [ "$package_var_name" = "PYTHON" ] && use_homebrew_readline || true
@@ -561,7 +563,7 @@ build_package_standard() {
   ) >&4 2>&1
 
   { "$MAKE" $MAKE_OPTS ${!PACKAGE_MAKE_OPTS} "${!PACKAGE_MAKE_OPTS_ARRAY}"
-    "$MAKE" install
+    "$MAKE" install $MAKE_INSTALL_OPTS ${!PACKAGE_MAKE_INSTALL_OPTS} "${!PACKAGE_MAKE_INSTALL_OPTS_ARRAY}"
   } >&4 2>&1
 }
 
@@ -678,7 +680,7 @@ install_jruby_launcher() {
 fix_jruby_shebangs() {
   for file in "${PREFIX_PATH}/bin"/*; do
     if [ "$(head -c 20 "$file")" = "#!/usr/bin/env jruby" ]; then
-      sed -i.bak -E "1s:.+:#\!${PREFIX_PATH}/bin/jruby:" "$file"
+      sed -i.bak "1 s:.*:#\!${PREFIX_PATH}\/bin\/jruby:" "$file"
       rm "$file".bak
     fi
   done
diff --git a/plugins/python-build/test/build.bats b/plugins/python-build/test/build.bats
index b614d3b2..e5c15d2e 100644
--- a/plugins/python-build/test/build.bats
+++ b/plugins/python-build/test/build.bats
@@ -47,7 +47,7 @@ OUT
 stub_make_install() {
   stub "$MAKE" \
     " : echo \"$MAKE \$@\" >> build.log" \
-    "install : cat build.log >> '$INSTALL_ROOT/build.log'"
+    "install : echo \"$MAKE \$@\" >> build.log && cat build.log >> '$INSTALL_ROOT/build.log'"
 }
 
 assert_build_log() {
@@ -56,7 +56,7 @@ assert_build_log() {
 }
 
 @test "yaml is installed for python" {
-  cached_tarball "yaml-0.1.4"
+  cached_tarball "yaml-0.1.5"
   cached_tarball "Python-3.2.1"
 
   stub brew false
@@ -69,15 +69,17 @@ assert_build_log() {
   unstub make
 
   assert_build_log <<OUT
-yaml-0.1.4: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
+yaml-0.1.5: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 2
+make install
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 2
+make install
 OUT
 }
 
 @test "apply python patch before building" {
-  cached_tarball "yaml-0.1.4"
+  cached_tarball "yaml-0.1.5"
   cached_tarball "Python-3.2.1"
 
   stub brew false
@@ -92,11 +94,13 @@ OUT
   unstub patch
 
   assert_build_log <<OUT
-yaml-0.1.4: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
+yaml-0.1.5: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 2
+make install
 patch -p0 -i -
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 2
+make install
 OUT
 }
 
@@ -118,6 +122,7 @@ OUT
   assert_build_log <<OUT
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib CPPFLAGS=-I$brew_libdir/include LDFLAGS=-L$brew_libdir/lib
 make -j 2
+make install
 OUT
 }
 
@@ -141,6 +146,7 @@ DEF
   assert_build_log <<OUT
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib CPPFLAGS=-I$readline_libdir/include LDFLAGS=-L$readline_libdir/lib
 make -j 2
+make install
 OUT
 }
 
@@ -166,6 +172,7 @@ DEF
   assert_build_log <<OUT
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib CPPFLAGS=-I$readline_libdir/include LDFLAGS=-L$readline_libdir/lib
 make -j 2
+make install
 OUT
 }
 
@@ -188,6 +195,7 @@ DEF
   assert_build_log <<OUT
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 2
+make install
 OUT
 }
 
@@ -211,6 +219,47 @@ DEF
   assert_build_log <<OUT
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 4
+make install
+OUT
+}
+
+@test "setting PYTHON_MAKE_INSTALL_OPTS to a multi-word string" {
+  cached_tarball "Python-3.2.1"
+
+  stub_make_install
+
+  export PYTHON_MAKE_INSTALL_OPTS="DOGE=\"such wow\""
+  run_inline_definition <<DEF
+install_package "Python-3.2.1" "http://python.org/ftp/python/3.2.1/Python-3.2.1.tar.gz"
+DEF
+  assert_success
+
+  unstub make
+
+  assert_build_log <<OUT
+Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
+make -j 2
+make install DOGE="such wow"
+OUT
+}
+
+@test "setting MAKE_INSTALL_OPTS to a multi-word string" {
+  cached_tarball "Python-3.2.1"
+
+  stub_make_install
+
+  export MAKE_INSTALL_OPTS="DOGE=\"such wow\""
+  run_inline_definition <<DEF
+install_package "Python-3.2.1" "http://python.org/ftp/python/3.2.1/Python-3.2.1.tar.gz"
+DEF
+  assert_success
+
+  unstub make
+
+  assert_build_log <<OUT
+Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
+make -j 2
+make install DOGE="such wow"
 OUT
 }
 
@@ -261,6 +310,7 @@ DEF
 apply -p1 -i /my/patch.diff
 Python-3.2.1: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
 make -j 2
+make install
 OUT
 }
 
diff --git a/plugins/python-build/test/fixtures/definitions/needs-yaml b/plugins/python-build/test/fixtures/definitions/needs-yaml
index ece923aa..deae9631 100644
--- a/plugins/python-build/test/fixtures/definitions/needs-yaml
+++ b/plugins/python-build/test/fixtures/definitions/needs-yaml
@@ -1,2 +1,2 @@
-install_package "yaml-0.1.4" "http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz" --if needs_yaml
+install_package "yaml-0.1.5" "http://pyyaml.org/download/libyaml/yaml-0.1.5.tar.gz" --if needs_yaml
 install_package "Python-3.2.1" "http://python.org/ftp/python/3.2.1/Python-3.2.1.tar.gz"
diff --git a/plugins/python-build/test/installer.bats b/plugins/python-build/test/installer.bats
index 811c9fe9..d0ba5054 100644
--- a/plugins/python-build/test/installer.bats
+++ b/plugins/python-build/test/installer.bats
@@ -17,6 +17,18 @@ load test_helper
   assert [ -e share/python-build/pypy-2.0 ]
 }
 
+@test "build definitions don't have the executable bit" {
+  cd "$TMP"
+  PREFIX="${PWD}/usr" run "${BATS_TEST_DIRNAME}/../install.sh"
+  assert_success ""
+
+  run $BASH -c 'ls -l usr/share/python-build | tail -2 | cut -d" " -f1'
+  assert_output <<OUT
+-rw-r--r--
+-rw-r--r--
+OUT
+}
+
 @test "overwrites old installation" {
   cd "$TMP"
   mkdir -p bin share/python-build