diff --git a/cmake/PCRE2.cmake b/cmake/PCRE2.cmake
index 73a375eae..372cadd58 100644
--- a/cmake/PCRE2.cmake
+++ b/cmake/PCRE2.cmake
@@ -6,5 +6,5 @@ if(FISH_USE_SYSTEM_PCRE2)
   set(FISH_PCRE2_BUILDFLAG "")
 else()
   message(STATUS "Forcing static build of PCRE2")
-  set(FISH_PCRE2_BUILDFLAG "CARGO_FEATURE_STATIC_PCRE2=1")
+  set(ENV{PCRE2_SYS_STATIC} "1")
 endif(FISH_USE_SYSTEM_PCRE2)
diff --git a/cmake/Rust.cmake b/cmake/Rust.cmake
index 7a7949663..ba66a0078 100644
--- a/cmake/Rust.cmake
+++ b/cmake/Rust.cmake
@@ -56,6 +56,5 @@ set(VARS_FOR_CARGO
     "LOCALEDIR=${CMAKE_INSTALL_FULL_LOCALEDIR}"
     "CARGO_TARGET_DIR=${FISH_RUST_BUILD_DIR}"
     "CARGO_BUILD_RUSTC=${RUSTC_EXECUTABLE}"
-    "${FISH_PCRE2_BUILDFLAG}"
     "RUSTFLAGS=$ENV{RUSTFLAGS} ${rust_debugflags}"
 )