diff --git a/swift/utils/build-script-impl b/swift/utils/build-script-impl
index b1d060328bc..218c9215260 100755
--- a/swift/utils/build-script-impl
+++ b/swift/utils/build-script-impl
@@ -1652,6 +1688,13 @@ for host in "${ALL_HOSTS[@]}"; do
                         -DLLVM_NATIVE_BUILD=$(build_directory "${LOCAL_HOST}" llvm)
                     )
                     cmake_options+=("${SWIFT_TARGET_CMAKE_OPTIONS[@]}")
+                    cmake_options+=(
+                        -DCMAKE_CXX_FLAGS="$CXXFLAGS --target=$CCTERMUX_HOST_PLATFORM $CPPFLAGS"
+                        -DCMAKE_EXE_LINKER_FLAGS="$LDFLAGS --target=$CCTERMUX_HOST_PLATFORM"
+                        -DCMAKE_FIND_ROOT_PATH:PATH="${CROSS_COMPILE_DEPS_PATH}"
+                        -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER
+                        -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY
+                    )
                 fi
 
                 ;;
@@ -1854,6 +1854,9 @@ for host in "${ALL_HOSTS[@]}"; do
                         "${cmake_options[@]}"
                         -DLLVM_TABLEGEN=$(build_directory "${LOCAL_HOST}" llvm)/bin/llvm-tblgen
                         -DSWIFT_INCLUDE_TEST_BINARIES:BOOL=FALSE
+                        -DCMAKE_FIND_ROOT_PATH:PATH="${CROSS_COMPILE_DEPS_PATH}"
+                        -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER
+                        -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY
                     )
                 fi
 
@@ -2045,6 +2045,8 @@ for host in "${ALL_HOSTS[@]}"; do
                     cmake_options+=(
                         -DCMAKE_FIND_ROOT_PATH:PATH="${CROSS_COMPILE_DEPS_PATH}"
                         -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER
+                        -DCMAKE_CXX_FLAGS="$CXXFLAGS --target=$CCTERMUX_HOST_PLATFORM $CPPFLAGS"
+                        -DCMAKE_EXE_LINKER_FLAGS="$LDFLAGS --target=$CCTERMUX_HOST_PLATFORM"
                     )
                 fi
 
@@ -2199,6 +2201,9 @@ for host in "${ALL_HOSTS[@]}"; do
                     # https://cmake.org/cmake/help/latest/command/find_package.html
                     cmake_options+=(
                         -DCMAKE_FIND_ROOT_PATH:PATH="${CROSS_COMPILE_DEPS_PATH}"
+                        -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER
+                        -DCMAKE_C_FLAGS="$CFLAGS --target=$CCTERMUX_HOST_PLATFORM $CPPFLAGS"
+                        -DCMAKE_EXE_LINKER_FLAGS="$LDFLAGS --target=$CCTERMUX_HOST_PLATFORM"
                     )
                 fi
                 if [[ "${host}" == "android-"* ]]; then
@@ -2239,6 +2243,11 @@ for host in "${ALL_HOSTS[@]}"; do
                   )
                   if [[ $(is_cross_tools_host ${host}) ]] ; then
                       cmake_options+=("${SWIFT_TARGET_CMAKE_OPTIONS[@]}")
+                      cmake_options+=(
+                          -DCMAKE_C_FLAGS="$CFLAGS --target=$CCTERMUX_HOST_PLATFORM $CPPFLAGS"
+                          -DCMAKE_EXE_LINKER_FLAGS="$LDFLAGS --target=$CCTERMUX_HOST_PLATFORM"
+                          -DCMAKE_SHARED_LINKER_FLAGS="$LDFLAGS --target=$CCTERMUX_HOST_PLATFORM"
+                      )
                   fi
                 ;;
                 esac
@@ -2929,7 +2999,20 @@ for host in "${ALL_HOSTS[@]}"; do
                 if [[ -z "${INSTALL_LLBUILD}" ]] ; then
                     continue
                 fi
-                INSTALL_TARGETS="install-swift-build-tool install-libllbuildSwift"
+                INSTALL_TARGETS="install-libllbuildSwift"
+                # Remove most libdispatch products before building the package manager.
+                rm -rf @TERMUX_PREFIX@/lib/swift{,_static}/{Block,os}
+                rm @TERMUX_PREFIX@/lib/swift{,_static}/dispatch/*.h
+                sed -i -e "s%dispatch\.h%@TERMUX_PREFIX@/include/dispatch/dispatch.h%" \
+                -e "s%introspection\.h%@TERMUX_PREFIX@/include/dispatch/introspection.h%" \
+                @TERMUX_PREFIX@/lib/swift/dispatch/module.modulemap
+                sed -i -e "s%dispatch\.h%@TERMUX_PREFIX@/include/dispatch/dispatch.h%" \
+                -e "s%introspection\.h%@TERMUX_PREFIX@/include/dispatch/introspection.h%" \
+                @TERMUX_PREFIX@/lib/swift_static/dispatch/module.modulemap
+                if [[ -z "${ANDROID_DATA}" ]] ; then
+                    mv @TERMUX_PREFIX@/lib/swift/${host/-//}/glibc.modulemap @TERMUX_PREFIX@/glibc-native.modulemap
+                    cp $(build_directory ${host} swift)/lib/swift/${host/-//}/glibc.modulemap @TERMUX_PREFIX@/lib/swift/${host/-//}/glibc.modulemap
+                fi
                 ;;
             # Products from this here install themselves; they don't fall-through.
             lldb)
                 if [[ -z "${INSTALL_LLDB}" ]] ; then