diff --git a/cmake/Install.cmake b/cmake/Install.cmake
index 0947b802b..7b1a2b188 100644
--- a/cmake/Install.cmake
+++ b/cmake/Install.cmake
@@ -41,15 +41,6 @@ set(extra_confdir
     CACHE STRING "Path for extra configuration")
 
 
-corrosion_set_env_vars(${fish_rust_target}
-    "PREFIX=${prefix}"
-    # Temporary hack to propogate CMake flags/options to build.rs.
-    "CMAKE_WITH_GETTEXT=${CMAKE_WITH_GETTEXT}"
-    "DOCDIR=${CMAKE_INSTALL_FULL_DOCDIR}"
-    "DATADIR=${CMAKE_INSTALL_FULL_DATADIR}"
-    "SYSCONFDIR=${CMAKE_INSTALL_FULL_SYSCONFDIR}"
-    "BINDIR=${CMAKE_INSTALL_FULL_BINDIR}"
-)
 # These are the man pages that go in system manpath; all manpages go in the fish-specific manpath.
 set(MANUALS ${CMAKE_CURRENT_BINARY_DIR}/user_doc/man/man1/fish.1
             ${CMAKE_CURRENT_BINARY_DIR}/user_doc/man/man1/fish_indent.1