diff --git a/pkgs/development/misc/stm32/betaflight/default.nix b/pkgs/development/misc/stm32/betaflight/default.nix
index fbe48803f2d..e66bb6fe211 100644
--- a/pkgs/development/misc/stm32/betaflight/default.nix
+++ b/pkgs/development/misc/stm32/betaflight/default.nix
@@ -33,7 +33,7 @@ in stdenv.mkDerivation rec {
     sed -ri "s/REVISION.*=.*git log.*/REVISION = ${builtins.substring 0 10 src.rev}/" Makefile # Simulate abbrev'd rev.
     sed -ri "s/binary hex/hex/" Makefile # No need for anything besides .hex
 
-    substitutateInPlace Makefile \
+    substituteInPlace Makefile \
       --replace "--specs=nano.specs" ""
   '';
 
diff --git a/pkgs/development/misc/stm32/inav/default.nix b/pkgs/development/misc/stm32/inav/default.nix
index 102b1eb8048..683883ddbce 100644
--- a/pkgs/development/misc/stm32/inav/default.nix
+++ b/pkgs/development/misc/stm32/inav/default.nix
@@ -27,7 +27,7 @@ in stdenv.mkDerivation rec {
     sed -ri "s/-j *[0-9]+//" Makefile # Eliminate parallel build args in submakes
     sed -ri "s/binary hex/hex/" Makefile # No need for anything besides .hex
 
-    substitutateInPlace Makefile \
+    substituteInPlace Makefile \
       --replace "--specs=nano.specs" ""
   '';