treewide: s_targetPlatform_hostPlatform_ in non-compiler packages

stdenv.targetPlatform really shouldn't be used by software that
doesn't generate or manipulate binaries.  I reviewed all uses of
targetPlatform outside of pkgs/development/compilers and pkgs/stdenv
and replaced those which weren't involved in something which fits
these criteria.

32 files changed, 45 insertions, 46 deletions

diff --git a/pkgs/development/interpreters/acl2/libipasirglucose4/default.nix b/pkgs/development/interpreters/acl2/libipasirglucose4/default.nix
index c31e0dbe67f73..e59d2ed7c176a 100644
--- a/pkgs/development/interpreters/acl2/libipasirglucose4/default.nix
+++ b/pkgs/development/interpreters/acl2/libipasirglucose4/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
   # that as the version number, I guess.
   version = "2017";
 
-  libname = pname + stdenv.targetPlatform.extensions.sharedLibrary;
+  libname = pname + stdenv.hostPlatform.extensions.sharedLibrary;
 
   src = fetchurl {
     url = "https://baldur.iti.kit.edu/sat-competition-2017/solvers/incremental/glucose-ipasir.zip";
diff --git a/pkgs/development/interpreters/tinyscheme/default.nix b/pkgs/development/interpreters/tinyscheme/default.nix
index 1b298af4ac492..fef3f5daceeb0 100644
--- a/pkgs/development/interpreters/tinyscheme/default.nix
+++ b/pkgs/development/interpreters/tinyscheme/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     # We want to have the makefile pick up $CC, etc. so that we don't have
     # to unnecessarily tie this package to the GCC stdenv.
     ./02-use-toolchain-env-vars.patch
-  ] ++ lib.optionals stdenv.targetPlatform.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # On macOS the library suffix is .dylib:
     ./03-macOS-SOsuf.patch
   ];
diff --git a/pkgs/development/libraries/SDL2/default.nix b/pkgs/development/libraries/SDL2/default.nix
index 2c05252c84734..dea308d59a2e4 100644
--- a/pkgs/development/libraries/SDL2/default.nix
+++ b/pkgs/development/libraries/SDL2/default.nix
@@ -9,7 +9,7 @@
 , libGL
 , alsaSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid
 , alsa-lib
-, x11Support ? !stdenv.targetPlatform.isWindows && !stdenv.hostPlatform.isAndroid
+, x11Support ? !stdenv.hostPlatform.isWindows && !stdenv.hostPlatform.isAndroid
 , libX11
 , xorgproto
 , libICE
@@ -122,7 +122,7 @@ stdenv.mkDerivation (finalAttrs: {
     "--disable-oss"
   ] ++ lib.optional (!x11Support) "--without-x"
   ++ lib.optional alsaSupport "--with-alsa-prefix=${alsa-lib.out}/lib"
-  ++ lib.optional stdenv.targetPlatform.isWindows "--disable-video-opengles"
+  ++ lib.optional stdenv.hostPlatform.isWindows "--disable-video-opengles"
   ++ lib.optional stdenv.isDarwin "--disable-sdltest";
 
   # We remove libtool .la files when static libs are requested,
diff --git a/pkgs/development/libraries/audio/zita-resampler/default.nix b/pkgs/development/libraries/audio/zita-resampler/default.nix
index 075ce33ef9e2e..70054134767ae 100644
--- a/pkgs/development/libraries/audio/zita-resampler/default.nix
+++ b/pkgs/development/libraries/audio/zita-resampler/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     cd source
     substituteInPlace Makefile \
       --replace 'ldconfig' ""
-  '' + lib.optionalString (!stdenv.targetPlatform.isx86_64) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isx86_64) ''
     substituteInPlace Makefile \
       --replace '-DENABLE_SSE2' ""
   '';
diff --git a/pkgs/development/libraries/blst/default.nix b/pkgs/development/libraries/blst/default.nix
index ef174d1118a9e..48865cf83564d 100644
--- a/pkgs/development/libraries/blst/default.nix
+++ b/pkgs/development/libraries/blst/default.nix
@@ -14,8 +14,8 @@ stdenv.mkDerivation ( finalAttrs: {
   buildPhase = ''
     runHook preBuild
 
-    ./build.sh ${lib.optionalString stdenv.targetPlatform.isWindows "flavour=mingw64"}
-    ./build.sh -shared ${lib.optionalString stdenv.targetPlatform.isWindows "flavour=mingw64"}
+    ./build.sh ${lib.optionalString stdenv.hostPlatform.isWindows "flavour=mingw64"}
+    ./build.sh -shared ${lib.optionalString stdenv.hostPlatform.isWindows "flavour=mingw64"}
 
     runHook postBuild
   '';
diff --git a/pkgs/development/libraries/cctz/default.nix b/pkgs/development/libraries/cctz/default.nix
index f1c1a272b5f91..0b945c8c5990a 100644
--- a/pkgs/development/libraries/cctz/default.nix
+++ b/pkgs/development/libraries/cctz/default.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
   buildInputs = lib.optional stdenv.isDarwin Foundation;
 
   installTargets = [ "install_hdrs" ]
-    ++ lib.optional (!stdenv.targetPlatform.isStatic) "install_shared_lib"
-    ++ lib.optional stdenv.targetPlatform.isStatic "install_lib";
+    ++ lib.optional (!stdenv.hostPlatform.isStatic) "install_shared_lib"
+    ++ lib.optional stdenv.hostPlatform.isStatic "install_lib";
 
   postInstall = lib.optionalString stdenv.isDarwin ''
     install_name_tool -id $out/lib/libcctz.so $out/lib/libcctz.so
diff --git a/pkgs/development/libraries/ffmpeg/generic.nix b/pkgs/development/libraries/ffmpeg/generic.nix
index 57235b24308de..e713ca1413fb3 100644
--- a/pkgs/development/libraries/ffmpeg/generic.nix
+++ b/pkgs/development/libraries/ffmpeg/generic.nix
@@ -52,7 +52,7 @@
 , withLadspa ? withFullDeps # LADSPA audio filtering
 , withLibplacebo ? withFullDeps && !stdenv.isDarwin # libplacebo video processing library
 , withLzma ? withHeadlessDeps # xz-utils
-, withMfx ? withFullDeps && (with stdenv.targetPlatform; isLinux && !isAarch) # Hardware acceleration via intel-media-sdk/libmfx
+, withMfx ? withFullDeps && (with stdenv.hostPlatform; isLinux && !isAarch) # Hardware acceleration via intel-media-sdk/libmfx
 , withModplug ? withFullDeps && !stdenv.isDarwin # ModPlug support
 , withMp3lame ? withHeadlessDeps # LAME MP3 encoder
 , withMysofa ? withFullDeps # HRTF support via SOFAlizer
@@ -386,8 +386,8 @@ stdenv.mkDerivation (finalAttrs: {
     (enableFeature withHardcodedTables "hardcoded-tables")
     (enableFeature withSafeBitstreamReader "safe-bitstream-reader")
 
-    (enableFeature (withMultithread && stdenv.targetPlatform.isUnix) "pthreads")
-    (enableFeature (withMultithread && stdenv.targetPlatform.isWindows) "w32threads")
+    (enableFeature (withMultithread && stdenv.hostPlatform.isUnix) "pthreads")
+    (enableFeature (withMultithread && stdenv.hostPlatform.isWindows) "w32threads")
     "--disable-os2threads" # We don't support OS/2
 
     (enableFeature withNetwork "network")
diff --git a/pkgs/development/libraries/libcef/default.nix b/pkgs/development/libraries/libcef/default.nix
index 5daca729bc738..2fb83097c02af 100644
--- a/pkgs/development/libraries/libcef/default.nix
+++ b/pkgs/development/libraries/libcef/default.nix
@@ -69,7 +69,7 @@ let
   platforms."aarch64-linux".sha256 = "12sp58nxa3nv800badv62vpvc30hyb0ykywdaxgv9y8pswp9lq0z";
   platforms."x86_64-linux".sha256 = "0vzzwq1k6bv9d209yg3samvfnfwj7s58y9r3p3pd98wxa9iyzf4j";
 
-  platformInfo = builtins.getAttr stdenv.targetPlatform.system platforms;
+  platformInfo = builtins.getAttr stdenv.hostPlatform.system platforms;
 in
 stdenv.mkDerivation rec {
   pname = "cef-binary";
diff --git a/pkgs/development/libraries/libsodium/default.nix b/pkgs/development/libraries/libsodium/default.nix
index b4eeed32d5967..b3a00d89a5d53 100644
--- a/pkgs/development/libraries/libsodium/default.nix
+++ b/pkgs/development/libraries/libsodium/default.nix
@@ -13,18 +13,18 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs = [ "out" "dev" ];
 
-  patches = lib.optional stdenv.targetPlatform.isMinGW ./mingw-no-fortify.patch;
+  patches = lib.optional stdenv.hostPlatform.isMinGW ./mingw-no-fortify.patch;
 
-  nativeBuildInputs = lib.optional stdenv.targetPlatform.isMinGW autoreconfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isMinGW autoreconfHook;
 
   separateDebugInfo = stdenv.isLinux && stdenv.hostPlatform.libc != "musl";
 
   enableParallelBuilding = true;
-  hardeningDisable = lib.optional (stdenv.targetPlatform.isMusl && stdenv.targetPlatform.isx86_32) "stackprotector";
+  hardeningDisable = lib.optional (stdenv.hostPlatform.isMusl && stdenv.hostPlatform.isx86_32) "stackprotector";
 
   # FIXME: the hardeingDisable attr above does not seems effective, so
   # the need to disable stackprotector via configureFlags
-  configureFlags = lib.optional (stdenv.targetPlatform.isMusl && stdenv.targetPlatform.isx86_32) "--disable-ssp";
+  configureFlags = lib.optional (stdenv.hostPlatform.isMusl && stdenv.hostPlatform.isx86_32) "--disable-ssp";
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/libusb1/default.nix b/pkgs/development/libraries/libusb1/default.nix
index 326ee30281582..1f768a2cb261f 100644
--- a/pkgs/development/libraries/libusb1/default.nix
+++ b/pkgs/development/libraries/libusb1/default.nix
@@ -4,7 +4,7 @@
 , fetchpatch
 , autoreconfHook
 , pkg-config
-, enableUdev ? stdenv.isLinux && !stdenv.targetPlatform.isStatic
+, enableUdev ? stdenv.isLinux && !stdenv.hostPlatform.isStatic
 , udev
 , libobjc
 , IOKit
diff --git a/pkgs/development/libraries/mtxclient/default.nix b/pkgs/development/libraries/mtxclient/default.nix
index dcba45f41c3dd..13816faefce9a 100644
--- a/pkgs/development/libraries/mtxclient/default.nix
+++ b/pkgs/development/libraries/mtxclient/default.nix
@@ -61,6 +61,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     # Should be fixable if a higher clang version is used, see:
     # https://github.com/NixOS/nixpkgs/pull/85922#issuecomment-619287177
-    broken = stdenv.targetPlatform.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/multipart-parser-c/default.nix b/pkgs/development/libraries/multipart-parser-c/default.nix
index 45b0abdee71b9..89665f2efc9af 100644
--- a/pkgs/development/libraries/multipart-parser-c/default.nix
+++ b/pkgs/development/libraries/multipart-parser-c/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     mkdir -p $out/lib
-    mv lib*${stdenv.targetPlatform.extensions.sharedLibrary} $out/lib/
+    mv lib*${stdenv.hostPlatform.extensions.sharedLibrary} $out/lib/
 
     mkdir -p $out/include
     mv *.h $out/include/
diff --git a/pkgs/development/libraries/ntl/default.nix b/pkgs/development/libraries/ntl/default.nix
index 9335bec35ce87..8fa37141628cc 100644
--- a/pkgs/development/libraries/ntl/default.nix
+++ b/pkgs/development/libraries/ntl/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     "TUNE=${
       if tune then
         "auto"
-      else if stdenv.targetPlatform.isx86 then
+      else if stdenv.hostPlatform.isx86 then
         "x86" # "chooses options that should be well suited for most x86 platforms"
       else
         "generic" # "chooses options that should be OK for most platforms"
diff --git a/pkgs/development/libraries/protobuf/generic.nix b/pkgs/development/libraries/protobuf/generic.nix
index bcef33b0cafa0..cf00d1d50bebb 100644
--- a/pkgs/development/libraries/protobuf/generic.nix
+++ b/pkgs/development/libraries/protobuf/generic.nix
@@ -76,7 +76,7 @@ stdenv.mkDerivation (finalAttrs: {
   ]
   # Tests fail to build on 32-bit platforms; fixed in 22.x
   # https://github.com/protocolbuffers/protobuf/issues/10418
-  ++ lib.optionals (stdenv.targetPlatform.is32bit && lib.versionOlder version "22") [
+  ++ lib.optionals (stdenv.hostPlatform.is32bit && lib.versionOlder version "22") [
     "-Dprotobuf_BUILD_TESTS=OFF"
   ];
 
@@ -85,7 +85,7 @@ stdenv.mkDerivation (finalAttrs: {
   # https://hydra.nixos.org/build/235677717/nixlog/4/tail
   # Also AnyTest.TestPackFromSerializationExceedsSizeLimit fails on 32-bit platforms
   # https://github.com/protocolbuffers/protobuf/issues/8460
-  doCheck = !(stdenv.isDarwin && lib.versionAtLeast version "23") && !stdenv.targetPlatform.is32bit;
+  doCheck = !(stdenv.isDarwin && lib.versionAtLeast version "23") && !stdenv.hostPlatform.is32bit;
 
   passthru = {
     tests = {
diff --git a/pkgs/development/libraries/relibc/default.nix b/pkgs/development/libraries/relibc/default.nix
index 3bc476ccc0f0b..437da86e8c21e 100644
--- a/pkgs/development/libraries/relibc/default.nix
+++ b/pkgs/development/libraries/relibc/default.nix
@@ -63,8 +63,7 @@ redoxRustPlatform.buildRustPackage rec {
     DESTDIR=$out make install
   '';
 
-  # TODO: should be hostPlatform
-  TARGET = stdenvNoCC.targetPlatform.rust.rustcTargetSpec;
+  TARGET = stdenvNoCC.hostPlatform.rust.rustcTargetSpec;
 
   cargoLock = {
     lockFile = ./Cargo.lock;
diff --git a/pkgs/development/libraries/science/math/libtorch/bin.nix b/pkgs/development/libraries/science/math/libtorch/bin.nix
index a47d8260714ab..47a6249ebdc62 100644
--- a/pkgs/development/libraries/science/math/libtorch/bin.nix
+++ b/pkgs/development/libraries/science/math/libtorch/bin.nix
@@ -26,7 +26,7 @@ in stdenv.mkDerivation {
   inherit version;
   pname = "libtorch";
 
-  src = fetchzip srcs."${stdenv.targetPlatform.system}-${device}" or unavailable;
+  src = fetchzip srcs."${stdenv.hostPlatform.system}-${device}" or unavailable;
 
   nativeBuildInputs =
     if stdenv.isDarwin then [ fixDarwinDylibNames ]
diff --git a/pkgs/development/libraries/science/math/zn_poly/default.nix b/pkgs/development/libraries/science/math/zn_poly/default.nix
index 13344db9ebc34..bdaf6e6284ef1 100644
--- a/pkgs/development/libraries/science/math/zn_poly/default.nix
+++ b/pkgs/development/libraries/science/math/zn_poly/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   # name of library file ("libzn_poly.so")
   libbasename = "libzn_poly";
-  libext = stdenv.targetPlatform.extensions.sharedLibrary;
+  libext = stdenv.hostPlatform.extensions.sharedLibrary;
 
   makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
diff --git a/pkgs/development/libraries/startup-notification/default.nix b/pkgs/development/libraries/startup-notification/default.nix
index c1c5819ad4219..bf84345be2d11 100644
--- a/pkgs/development/libraries/startup-notification/default.nix
+++ b/pkgs/development/libraries/startup-notification/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "3c391f7e930c583095045cd2d10eb73a64f085c7fde9d260f2652c7cb3cfbe4a";
   };
 
-  configureFlags = lib.optionals (stdenv.buildPlatform != stdenv.targetPlatform) [
+  configureFlags = lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
     "lf_cv_sane_realloc=yes"
   ];
 
diff --git a/pkgs/development/libraries/tk/generic.nix b/pkgs/development/libraries/tk/generic.nix
index ab973c957aed4..57a9b617d950d 100644
--- a/pkgs/development/libraries/tk/generic.nix
+++ b/pkgs/development/libraries/tk/generic.nix
@@ -22,7 +22,7 @@ tcl.mkTclDerivation {
       substituteInPlace $file --replace "exec wish" "exec $out/bin/wish"
     done
   ''
-  + lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.targetPlatform.darwinMinVersion "11") ''
+  + lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") ''
     substituteInPlace unix/configure* \
       --replace " -framework UniformTypeIdentifiers" ""
   '';
diff --git a/pkgs/development/libraries/v8/default.nix b/pkgs/development/libraries/v8/default.nix
index a9891a9d328c6..7edf2cdf7c46b 100644
--- a/pkgs/development/libraries/v8/default.nix
+++ b/pkgs/development/libraries/v8/default.nix
@@ -136,7 +136,7 @@ stdenv.mkDerivation rec {
   ++ lib.optional stdenv.isDarwin ''use_lld=false'';
 
   env.NIX_CFLAGS_COMPILE = "-O2";
-  FORCE_MAC_SDK_MIN = stdenv.targetPlatform.sdkVer or "10.12";
+  FORCE_MAC_SDK_MIN = stdenv.hostPlatform.sdkVer or "10.12";
 
   nativeBuildInputs = [
     myGn
diff --git a/pkgs/development/libraries/vapoursynth/plugin-interface.nix b/pkgs/development/libraries/vapoursynth/plugin-interface.nix
index 064893a3dbcd9..f962634b131e7 100644
--- a/pkgs/development/libraries/vapoursynth/plugin-interface.nix
+++ b/pkgs/development/libraries/vapoursynth/plugin-interface.nix
@@ -36,7 +36,7 @@ plugins: let
     $CC -shared -fPIC ${source} -o "$out/lib/libvapoursynth-nix-plugins${ext}"
   '';
 
-  ext = stdenv.targetPlatform.extensions.sharedLibrary;
+  ext = stdenv.hostPlatform.extensions.sharedLibrary;
 in
 runCommand "${vapoursynth.name}-with-plugins" {
   nativeBuildInputs = [ makeWrapper ];
diff --git a/pkgs/development/libraries/wayland/protocols.nix b/pkgs/development/libraries/wayland/protocols.nix
index dc53bbb54d2a7..0fadb103ce33d 100644
--- a/pkgs/development/libraries/wayland/protocols.nix
+++ b/pkgs/development/libraries/wayland/protocols.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
   version = "1.32";
 
   # https://gitlab.freedesktop.org/wayland/wayland-protocols/-/issues/48
-  doCheck = stdenv.hostPlatform == stdenv.buildPlatform && stdenv.targetPlatform.linker == "bfd" && wayland.withLibraries;
+  doCheck = stdenv.hostPlatform == stdenv.buildPlatform && stdenv.hostPlatform.linker == "bfd" && wayland.withLibraries;
 
   src = fetchurl {
     url = "https://gitlab.freedesktop.org/wayland/${pname}/-/releases/${version}/downloads/${pname}-${version}.tar.xz";
diff --git a/pkgs/development/python-modules/distlib/default.nix b/pkgs/development/python-modules/distlib/default.nix
index ca91e77a6672c..cf31574e6fdbd 100644
--- a/pkgs/development/python-modules/distlib/default.nix
+++ b/pkgs/development/python-modules/distlib/default.nix
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     setuptools
   ];
 
-  postFixup = lib.optionalString (!stdenv.targetPlatform.isWindows) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isWindows) ''
     find $out -name '*.exe' -delete
   '';
 
diff --git a/pkgs/development/python-modules/jaxlib/default.nix b/pkgs/development/python-modules/jaxlib/default.nix
index ae479120ed1ae..c70ab0ac2b327 100644
--- a/pkgs/development/python-modules/jaxlib/default.nix
+++ b/pkgs/development/python-modules/jaxlib/default.nix
@@ -136,8 +136,8 @@ let
 
   arch =
     # KeyError: ('Linux', 'arm64')
-    if stdenv.targetPlatform.isLinux && stdenv.targetPlatform.linuxArch == "arm64" then "aarch64"
-    else stdenv.targetPlatform.linuxArch;
+    if stdenv.hostPlatform.isLinux && stdenv.hostPlatform.linuxArch == "arm64" then "aarch64"
+    else stdenv.hostPlatform.linuxArch;
 
   bazel-build = buildBazelPackage rec {
     name = "bazel-build-${pname}-${version}";
@@ -219,7 +219,7 @@ let
       build --python_path="${python}/bin/python"
       build --distinct_host_configuration=false
       build --define PROTOBUF_INCLUDE_PATH="${pkgs.protobuf}/include"
-    '' + lib.optionalString (stdenv.targetPlatform.avxSupport && stdenv.targetPlatform.isUnix) ''
+    '' + lib.optionalString (stdenv.hostPlatform.avxSupport && stdenv.hostPlatform.isUnix) ''
       build --config=avx_posix
     '' + lib.optionalString mklSupport ''
       build --config=mkl_open_source_only
@@ -298,13 +298,13 @@ let
     inherit meta;
   };
   platformTag =
-    if stdenv.targetPlatform.isLinux then
+    if stdenv.hostPlatform.isLinux then
       "manylinux2014_${arch}"
     else if stdenv.system == "x86_64-darwin" then
       "macosx_10_9_${arch}"
     else if stdenv.system == "aarch64-darwin" then
       "macosx_11_0_${arch}"
-    else throw "Unsupported target platform: ${stdenv.targetPlatform}";
+    else throw "Unsupported target platform: ${stdenv.hostPlatform}";
 
 in
 buildPythonPackage {
diff --git a/pkgs/development/python-modules/mido/default.nix b/pkgs/development/python-modules/mido/default.nix
index 65702b23c7ad9..84fe78a594750 100644
--- a/pkgs/development/python-modules/mido/default.nix
+++ b/pkgs/development/python-modules/mido/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   patches = [
     (substituteAll {
       src = ./libportmidi-cdll.patch;
-      libportmidi = "${portmidi.out}/lib/libportmidi${stdenv.targetPlatform.extensions.sharedLibrary}";
+      libportmidi = "${portmidi.out}/lib/libportmidi${stdenv.hostPlatform.extensions.sharedLibrary}";
     })
   ];
 
diff --git a/pkgs/development/python-modules/mpv/default.nix b/pkgs/development/python-modules/mpv/default.nix
index c956bb90aa8f8..3763e25660a53 100644
--- a/pkgs/development/python-modules/mpv/default.nix
+++ b/pkgs/development/python-modules/mpv/default.nix
@@ -27,7 +27,7 @@ buildPythonPackage rec {
   postPatch = ''
     substituteInPlace mpv.py \
       --replace "sofile = ctypes.util.find_library('mpv')" \
-                'sofile = "${mpv}/lib/libmpv${stdenv.targetPlatform.extensions.sharedLibrary}"'
+                'sofile = "${mpv}/lib/libmpv${stdenv.hostPlatform.extensions.sharedLibrary}"'
   '';
 
   # tests impure, will error if it can't load libmpv.so
diff --git a/pkgs/development/python-modules/mysql-connector/default.nix b/pkgs/development/python-modules/mysql-connector/default.nix
index ba963ff0d5ddb..575c438eb5514 100644
--- a/pkgs/development/python-modules/mysql-connector/default.nix
+++ b/pkgs/development/python-modules/mysql-connector/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
   patches = [
     # mysql-connector overrides MACOSX_DEPLOYMENT_TARGET to 11.
     # This makes the installation with nixpkgs fail. I suspect, that's
-    # because stdenv.targetPlatform.darwinSdkVersion is (currently) set to
+    # because stdenv.hostPlatform.darwinSdkVersion is (currently) set to
     # 10.12. The patch reverts
     # https://github.com/mysql/mysql-connector-python/commit/d1e89fd3d7391084cdf35b0806cb5d2a4b413654
     ./0001-Revert-Fix-MacOS-wheels-platform-tag.patch
diff --git a/pkgs/development/python-modules/testpath/default.nix b/pkgs/development/python-modules/testpath/default.nix
index 5635a61561594..eb66bea56f573 100644
--- a/pkgs/development/python-modules/testpath/default.nix
+++ b/pkgs/development/python-modules/testpath/default.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
 
   # exe are only required when testpath is used on windows
   # https://github.com/jupyter/testpath/blob/de8ca59539eb23b9781e55848b7d2646c8c61df9/testpath/commands.py#L128
-  preBuild = lib.optionalString (!stdenv.targetPlatform.isWindows) ''
+  preBuild = lib.optionalString (!stdenv.hostPlatform.isWindows) ''
     rm testpath/cli-32.exe testpath/cli-64.exe
   '';
 
diff --git a/pkgs/development/python-modules/torch/default.nix b/pkgs/development/python-modules/torch/default.nix
index c9bf7c45766f0..4217b87e81e7c 100644
--- a/pkgs/development/python-modules/torch/default.nix
+++ b/pkgs/development/python-modules/torch/default.nix
@@ -189,7 +189,7 @@ in buildPythonPackage rec {
   ''
   # error: no member named 'aligned_alloc' in the global namespace; did you mean simply 'aligned_alloc'
   # This lib overrided aligned_alloc hence the error message. Tltr: his function is linkable but not in header.
-  + lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.targetPlatform.darwinSdkVersion "11.0") ''
+  + lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0") ''
     substituteInPlace third_party/pocketfft/pocketfft_hdronly.h --replace '#if __cplusplus >= 201703L
     inline void *aligned_alloc(size_t align, size_t size)' '#if __cplusplus >= 201703L && 0
     inline void *aligned_alloc(size_t align, size_t size)'
diff --git a/pkgs/development/tools/azure-functions-core-tools/default.nix b/pkgs/development/tools/azure-functions-core-tools/default.nix
index e187dbf6b3937..cf039c5758f5e 100644
--- a/pkgs/development/tools/azure-functions-core-tools/default.nix
+++ b/pkgs/development/tools/azure-functions-core-tools/default.nix
@@ -27,7 +27,7 @@
     };
   };
 
-  platformInfo = builtins.getAttr stdenv.targetPlatform.system platforms;
+  platformInfo = builtins.getAttr stdenv.hostPlatform.system platforms;
 in
   stdenv.mkDerivation rec {
     pname = "azure-functions-core-tools";
diff --git a/pkgs/development/tools/azure-static-sites-client/default.nix b/pkgs/development/tools/azure-static-sites-client/default.nix
index 5ac8f971cf35a..441496ed4352c 100644
--- a/pkgs/development/tools/azure-static-sites-client/default.nix
+++ b/pkgs/development/tools/azure-static-sites-client/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
   pname = "StaticSitesClient-${versionFlavor}";
   version = flavor.buildId;
 
-  src = sources.${stdenv.targetPlatform.system} or (throw "Unsupported platform");
+  src = sources.${stdenv.hostPlatform.system} or (throw "Unsupported platform");
 
   nativeBuildInputs = [
     autoPatchelfHook
diff --git a/pkgs/development/tools/faas-cli/default.nix b/pkgs/development/tools/faas-cli/default.nix
index 383ca09294491..026dbbcc54828 100644
--- a/pkgs/development/tools/faas-cli/default.nix
+++ b/pkgs/development/tools/faas-cli/default.nix
@@ -37,7 +37,7 @@ buildGoModule rec {
     "-s" "-w"
     "-X github.com/openfaas/faas-cli/version.GitCommit=ref/tags/${version}"
     "-X github.com/openfaas/faas-cli/version.Version=${version}"
-    "-X github.com/openfaas/faas-cli/commands.Platform=${faasPlatform stdenv.targetPlatform}"
+    "-X github.com/openfaas/faas-cli/commands.Platform=${faasPlatform stdenv.hostPlatform}"
   ];
 
   nativeBuildInputs = [ makeWrapper installShellFiles ];