diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index cd333a4a..314158f8 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -1322,9 +1322,10 @@ configured_with_package_dir() {
 }
 
 use_homebrew() {
+  is_mac || return 1
   # unless Homebrew is at the default /usr/local, need to add its paths to
   # compiler search to be able to use non-keg-only deps from there
-  if command -v brew &>/dev/null; then
+  if is_mac && command -v brew &>/dev/null; then
     local brew_prefix="$(brew --prefix 2>/dev/null || true)"
     # /usr/local/lib:/usr/lib is the default library search path
     if [[ -n $brew_prefix && $brew_prefix != "/usr" && $brew_prefix != "/usr/local" ]]; then
@@ -1340,6 +1341,7 @@ needs_yaml() {
 }
 
 use_homebrew_yaml() {
+  is_mac || return 1
   local libdir="$(brew --prefix libyaml 2>/dev/null || true)"
   if [ -d "$libdir" ]; then
     echo "python-build: use libyaml from homebrew"
@@ -1383,6 +1385,7 @@ has_broken_mac_readline() {
 }
 
 use_homebrew_readline() {
+  is_mac || return 1
   if ! configured_with_package_dir "python" "readline/rlconf.h"; then
     local libdir="$(brew --prefix readline 2>/dev/null || true)"
     if [ -d "$libdir" ]; then
@@ -1423,6 +1426,7 @@ has_broken_mac_openssl() {
 }
 
 use_homebrew_openssl() {
+  is_mac || return 1
   command -v brew >/dev/null || return 1
   for openssl in ${PYTHON_BUILD_HOMEBREW_OPENSSL_FORMULA:-openssl}; do
     local ssldir="$(brew --prefix "${openssl}" || true)"
@@ -1522,6 +1526,7 @@ build_package_verify_openssl() {
 }
 
 use_homebrew_zlib() {
+  is_mac || return 1
   local brew_zlib="$(brew --prefix zlib 2>/dev/null || true)"
   if [ -d "$brew_zlib" ]; then
     echo "python-build: use zlib from homebrew"
@@ -1541,6 +1546,7 @@ use_xcode_sdk_zlib() {
 }
 
 use_homebrew_tcltk() {
+  is_mac || return 1
   # get the version from the folder that homebrew versions
   local tcltk_libdir="$(brew --prefix tcl-tk 2>/dev/null || true)"
   if [ -d "$tcltk_libdir" ]; then
@@ -1598,7 +1604,9 @@ get_tcltk_flag_from() {
 }
 
 use_tcltk() {
-  local tcltk_libdir="$(brew --prefix tcl-tk 2>/dev/null || true)"
+  if is_mac; then
+    local tcltk_libdir="$(brew --prefix tcl-tk 2>/dev/null || true)"
+  fi
   local tcl_tk_libs="$(get_tcltk_flag_from "$PYTHON_CONFIGURE_OPTS")"
 
   # if tcltk_ops_flag is in PYTHON_CONFIGURE_OPTS, use user provided tcltk
diff --git a/plugins/python-build/test/build.bats b/plugins/python-build/test/build.bats
index bcf656c2..e324c02d 100644
--- a/plugins/python-build/test/build.bats
+++ b/plugins/python-build/test/build.bats
@@ -62,7 +62,7 @@ assert_build_log() {
   cached_tarball "yaml-0.1.6"
   cached_tarball "Python-3.6.2"
 
-  for i in {1..4}; do stub uname '-s : echo Linux'; done
+  for i in {1..9}; do stub uname '-s : echo Linux'; done
   stub brew false
   stub_make_install
   stub_make_install
@@ -89,7 +89,7 @@ OUT
   cached_tarball "yaml-0.1.6"
   cached_tarball "Python-3.6.2"
 
-  for i in {1..4}; do stub uname '-s : echo Linux'; done
+  for i in {1..9}; do stub uname '-s : echo Linux'; done
   stub brew false
   stub_make_install
   stub_make_install
@@ -119,15 +119,12 @@ OUT
   cached_tarball "yaml-0.1.6"
   cached_tarball "Python-3.6.2"
 
-  stub uname '-s : echo Linux' '-s : echo Linux'
+  for i in {1..9}; do stub uname '-s : echo Linux'; done
   stub brew false
   stub_make_install
   stub_make_install
   stub patch ' : echo patch "$@" | sed -E "s/\.[[:alnum:]]+$/.XXX/" >> build.log'
 
-  # pyenv/pyenv#1026
-  stub uname false false
-
   TMPDIR="$TMP" install_fixture --patch definitions/needs-yaml <<<"diff --git a/script.py"
   assert_success
 
@@ -154,7 +151,7 @@ OUT
   BREW_PREFIX="$TMP/homebrew-prefix"
   mkdir -p "$BREW_PREFIX"
 
-  for i in {1..4}; do stub uname '-s : echo Darwin'; done
+  for i in {1..9}; do stub uname '-s : echo Darwin'; done
   for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
   stub brew "--prefix : echo '$BREW_PREFIX'" false
   stub_make_install
@@ -164,8 +161,8 @@ install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.
 DEF
   assert_success
 
-  unstub sw_vers
   unstub uname
+  unstub sw_vers
   unstub make
 
   assert_build_log <<OUT
@@ -182,7 +179,7 @@ OUT
   brew_libdir="$TMP/homebrew-yaml"
   mkdir -p "$brew_libdir"
 
-  for i in {1..4}; do stub uname '-s : echo Darwin'; done
+  for i in {1..10}; do stub uname '-s : echo Darwin'; done
   for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
   stub brew "--prefix libyaml : echo '$brew_libdir'"
   for i in {1..4}; do stub brew false; done
@@ -191,8 +188,8 @@ OUT
   install_fixture definitions/needs-yaml
   assert_success
 
-  unstub sw_vers
   unstub uname
+  unstub sw_vers
   unstub brew
   unstub make
 
@@ -204,12 +201,41 @@ make install
 OUT
 }
 
+@test "yaml is not linked from Homebrew in non-MacOS" {
+  cached_tarball "yaml-0.1.6"
+  cached_tarball "Python-3.6.2"
+
+  for i in {1..9}; do stub uname '-s : echo Linux'; done
+  stub brew true; brew
+  stub_make_install
+  stub_make_install
+
+  install_fixture definitions/needs-yaml
+  assert_success
+
+  unstub uname
+  unstub brew
+  unstub make
+
+  assert_build_log <<OUT
+yaml-0.1.6: CPPFLAGS="-I${TMP}/install/include " LDFLAGS="-L${TMP}/install/lib "
+yaml-0.1.6: --prefix=${TMP}/install
+make -j 2
+make install
+Python-3.6.2: CPPFLAGS="-I${TMP}/install/include " LDFLAGS="-L${TMP}/install/lib "
+Python-3.6.2: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
+make -j 2
+make install
+OUT
+}
+
 @test "readline is linked from Homebrew" {
   cached_tarball "Python-3.6.2"
 
   readline_libdir="$TMP/homebrew-readline"
   mkdir -p "$readline_libdir"
-  stub uname false
+  for i in {1..8}; do stub uname '-s : echo Darwin'; done
+  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
   for i in {1..2}; do stub brew false; done
   stub brew "--prefix readline : echo '$readline_libdir'"
   stub brew false
@@ -220,6 +246,8 @@ install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.
 DEF
   assert_success
 
+  unstub uname
+  unstub sw_vers
   unstub brew
   unstub make
 
@@ -231,6 +259,30 @@ make install
 OUT
 }
 
+@test "no library searches performed during normal operation touch homebrew in non-MacOS" {
+  cached_tarball "Python-3.6.2"
+
+  for i in {1..8}; do stub uname '-s : echo Linux'; done
+  stub brew true; brew
+  stub_make_install
+
+  run_inline_definition <<DEF
+install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.tar.gz"
+DEF
+  assert_success
+
+  unstub uname
+  unstub brew
+  unstub make
+
+  assert_build_log <<OUT
+Python-3.6.2: CPPFLAGS="-I${TMP}/install/include " LDFLAGS="-L${TMP}/install/lib "
+Python-3.6.2: --prefix=$INSTALL_ROOT --libdir=$INSTALL_ROOT/lib
+make -j 2
+make install
+OUT
+}
+
 @test "readline is not linked from Homebrew when explicitly defined" {
   cached_tarball "Python-3.6.2"
 
@@ -239,8 +291,8 @@ OUT
   mkdir -p "$readline_libdir/include/readline"
   touch "$readline_libdir/include/readline/rlconf.h"
 
-  # pyenv/pyenv#1026
-  stub uname false false
+  for i in {1..8}; do stub uname '-s : echo Darwin'; done
+  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
 
   for i in {1..3}; do stub brew false; done
   stub_make_install
@@ -251,6 +303,8 @@ install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.
 DEF
   assert_success
 
+  unstub uname
+  unstub sw_vers
   unstub brew
   unstub make
 
@@ -269,10 +323,13 @@ OUT
   mkdir -p "$tcl_tk_libdir/lib"
   echo "TCL_VERSION='$tcl_tk_version'" >>"$tcl_tk_libdir/lib/tclConfig.sh"
 
-  stub uname false
+  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
+
   stub brew false
   for i in {1..2}; do stub brew "--prefix tcl-tk : echo '$tcl_tk_libdir'"; done
   for i in {1..2}; do stub brew false; done
+
   stub_make_install
 
   run_inline_definition <<DEF
@@ -280,6 +337,8 @@ install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.
 DEF
   assert_success
 
+  unstub uname
+  unstub sw_vers
   unstub brew
   unstub make
 
@@ -298,8 +357,8 @@ OUT
   tcl_tk_version_long="8.6.10"
   tcl_tk_version="${tcl_tk_version_long%.*}"
 
-  # pyenv/pyenv#1026
-  stub uname false false
+  for i in {1..9}; do stub uname '-s : echo Darwin'; done
+  for i in {1..2}; do stub sw_vers '-productVersion : echo 1010'; done
 
   for i in {1..4}; do stub brew false; done
   stub_make_install
@@ -310,6 +369,8 @@ install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.
 DEF
   assert_success
 
+  unstub uname
+  unstub sw_vers
   unstub brew
   unstub make
 
@@ -324,14 +385,9 @@ OUT
 @test "number of CPU cores defaults to 2" {
   cached_tarball "Python-3.6.2"
 
-  # yyuu/pyenv#222
-  stub uname '-s : echo Darwin'
-  stub sw_vers '-productVersion : echo 10.10'
+  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  for i in {1..2}; do stub sw_vers '-productVersion : echo 10.10'; done
 
-  # yyuu/pyenv#257
-  stub uname '-s : echo Darwin'
-
-  stub uname '-s : echo Darwin' false '-s : echo Darwin'
   stub sysctl false
   stub_make_install
 
@@ -342,6 +398,7 @@ DEF
   assert_success
 
   unstub uname
+  unstub sw_vers
   unstub make
 
   assert_build_log <<OUT
@@ -355,14 +412,9 @@ OUT
 @test "number of CPU cores is detected on Mac" {
   cached_tarball "Python-3.6.2"
 
-  # yyuu/pyenv#222
-  stub uname '-s : echo Darwin'
-  stub sw_vers '-productVersion : echo 10.10'
+  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  for i in {1..2}; do stub sw_vers '-productVersion : echo 10.10'; done
 
-  # yyuu/pyenv#257
-  stub uname '-s : echo Darwin'
-
-  stub uname '-s : echo Darwin' false '-s : echo Darwin'
   stub sysctl '-n hw.ncpu : echo 4'
   stub_make_install
 
@@ -373,6 +425,7 @@ DEF
   assert_success
 
   unstub uname
+  unstub sw_vers
   unstub sysctl
   unstub make
 
@@ -387,10 +440,10 @@ OUT
 @test "number of CPU cores is detected on FreeBSD" {
   cached_tarball "Python-3.6.2"
 
-  # pyenv/pyenv#1026
-  stub uname false false
+  for i in {1..7}; do stub uname '-s : echo FreeBSD'; done
+  stub uname '-r : echo 11.0-RELEASE'
+  for i in {1..2}; do stub uname '-s : echo FreeBSD'; done
 
-  stub uname '-s : echo FreeBSD' false false
   stub sysctl '-n hw.ncpu : echo 1'
   stub_make_install
 
@@ -415,10 +468,8 @@ OUT
 @test "setting PYTHON_MAKE_INSTALL_OPTS to a multi-word string" {
   cached_tarball "Python-3.6.2"
 
-  # pyenv/pyenv#1026
-  stub uname false false false
+  for i in {1..8}; do stub uname '-s : echo Linux'; done
 
-  stub uname '-s : echo Linux'
   stub_make_install
 
   export PYTHON_MAKE_INSTALL_OPTS="DOGE=\"such wow\""
@@ -441,10 +492,7 @@ OUT
 @test "setting MAKE_INSTALL_OPTS to a multi-word string" {
   cached_tarball "Python-3.6.2"
 
-  # pyenv/pyenv#1026
-  stub uname false false false
-
-  stub uname '-s : echo Linux'
+  for i in {1..8}; do stub uname '-s : echo Linux'; done
   stub_make_install
 
   export MAKE_INSTALL_OPTS="DOGE=\"such wow\""
@@ -476,10 +524,10 @@ OUT
 @test "make on FreeBSD 9 defaults to gmake" {
   cached_tarball "Python-3.6.2"
 
-  stub uname "-s : echo FreeBSD" "-r : echo 9.1" false
-
-  # pyenv/pyenv#1026
-  stub uname false false false
+  stub uname "-s : echo FreeBSD" "-r : echo 9.1"
+  for i in {1..6}; do stub uname "-s : echo FreeBSD"; done
+  stub uname "-r : echo 9.1"
+  for i in {1..2}; do stub uname "-s : echo FreeBSD"; done
 
   MAKE=gmake stub_make_install
 
@@ -493,10 +541,10 @@ OUT
 @test "make on FreeBSD 10" {
   cached_tarball "Python-3.6.2"
 
-  stub uname "-s : echo FreeBSD" "-r : echo 10.0-RELEASE" false
-
-  # pyenv/pyenv#1026
-  stub uname false false false
+  stub uname "-s : echo FreeBSD" "-r : echo 10.0-RELEASE"
+  for i in {1..6}; do stub uname "-s : echo FreeBSD"; done
+  stub uname "-r : echo 10.0-RELEASE"
+  for i in {1..2}; do stub uname "-s : echo FreeBSD"; done
 
   stub_make_install
 
@@ -509,10 +557,10 @@ OUT
 @test "make on FreeBSD 11" {
   cached_tarball "Python-3.6.2"
 
-  stub uname "-s : echo FreeBSD" "-r : echo 11.0-RELEASE" false
-
-  # pyenv/pyenv#1026
-  stub uname false false false
+  stub uname "-s : echo FreeBSD" "-r : echo 11.0-RELEASE"
+  for i in {1..6}; do stub uname "-s : echo FreeBSD"; done
+  stub uname "-r : echo 11.0-RELEASE"
+  for i in {1..2}; do stub uname "-s : echo FreeBSD"; done
 
   stub_make_install
 
@@ -531,15 +579,10 @@ apply -p1 -i /my/patch.diff
 exec ./configure "\$@"
 CONF
 
-  stub uname '-s : echo Linux'
+  for i in {1..8}; do stub uname '-s : echo Linux'; done
   stub apply 'echo apply "$@" >> build.log'
   stub_make_install
 
-  # yyuu/pyenv#257
-  stub uname '-s : echo Linux'
-  stub uname '-s : echo Linux'
-  stub uname '-s : echo Linux'
-
   export PYTHON_CONFIGURE="${TMP}/custom-configure"
   run_inline_definition <<DEF
 install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.tar.gz"
diff --git a/plugins/python-build/test/compiler.bats b/plugins/python-build/test/compiler.bats
index df813056..c07f12c4 100644
--- a/plugins/python-build/test/compiler.bats
+++ b/plugins/python-build/test/compiler.bats
@@ -63,8 +63,8 @@ DEF
   mkdir -p "$INSTALL_ROOT"
   cd "$INSTALL_ROOT"
 
-  for i in {1..5}; do stub uname '-s : echo Darwin'; done
-  for i in {1..4}; do stub sw_vers '-productVersion : echo 10.10'; done
+  for i in {1..10}; do stub uname '-s : echo Darwin'; done
+  for i in {1..3}; do stub sw_vers '-productVersion : echo 10.10'; done
 
   stub cc 'false'
   stub brew 'false'
@@ -85,6 +85,10 @@ exec 4<&1
 build_package_standard python
 DEF
   assert_success
+
+  unstub uname
+  unstub sw_vers
+
   assert_output <<OUT
 ./configure --prefix=$INSTALL_ROOT --libdir=${TMP}/install/lib
 CC=clang
diff --git a/plugins/python-build/test/pyenv_ext.bats b/plugins/python-build/test/pyenv_ext.bats
index 45663605..8a6f18af 100644
--- a/plugins/python-build/test/pyenv_ext.bats
+++ b/plugins/python-build/test/pyenv_ext.bats
@@ -315,7 +315,7 @@ EOS
   cached_tarball "Python-3.6.2"
 
   for i in {1..4}; do stub brew false; done
-  for i in {1..3}; do stub uname '-s : echo Linux'; done
+  for i in {1..7}; do stub uname '-s : echo Linux'; done
   stub "$MAKE" \
     " : echo \"$MAKE \$@\" >> build.log" \
     " : echo \"$MAKE \$@\" >> build.log && cat build.log >> '$INSTALL_ROOT/build.log'"
@@ -332,7 +332,6 @@ OUT
 
   unstub make
   unstub uname
-  unstub brew
 }
 
 @test "default MACOSX_DEPLOYMENT_TARGET" {