diff --git a/pkgs/applications/misc/gammu/default.nix b/pkgs/applications/misc/gammu/default.nix
index 736685f5eb1..1a67163d06c 100644
--- a/pkgs/applications/misc/gammu/default.nix
+++ b/pkgs/applications/misc/gammu/default.nix
@@ -8,13 +8,13 @@ with lib;
 
 stdenv.mkDerivation rec {
   pname = "gammu";
-  version = "1.40.0";
+  version = "1.42.0";
 
   src = fetchFromGitHub {
     owner = "gammu";
     repo = "gammu";
     rev = version;
-    sha256 = "1jjaa9r3x6i8gv3yn1ngg815s6gsxblsw4wb5ddm77kamn2qyvpf";
+    sha256 = "sha256-aeaGHVxOMiXRU6RHws+oAnzdO9RY1jw/X/xuGfSt76I=";
   };
 
   patches = [ ./bashcomp-dir.patch ./systemd.patch ];
diff --git a/pkgs/applications/misc/gammu/systemd.patch b/pkgs/applications/misc/gammu/systemd.patch
index 22b49a5a2ff..315fd64a3b5 100644
--- a/pkgs/applications/misc/gammu/systemd.patch
+++ b/pkgs/applications/misc/gammu/systemd.patch
@@ -1,8 +1,8 @@
 diff --git a/cmake/templates/gammu.spec.in b/cmake/templates/gammu.spec.in
-index 8302353..e3ca59a 100644
+index 25c08b3d6..86f72d8c7 100644
 --- a/cmake/templates/gammu.spec.in
 +++ b/cmake/templates/gammu.spec.in
-@@ -387,9 +387,9 @@ fi
+@@ -386,9 +386,9 @@ fi
  %doc %{_mandir}/man7/gammu-smsd-run.7*
  %doc %{_mandir}/man7/gammu-smsd-sql.7*
  %doc %{_mandir}/man7/gammu-smsd-tables.7*
@@ -16,13 +16,13 @@ index 8302353..e3ca59a 100644
  %files -n libGammu%{so_ver} -f libgammu.lang
  %defattr(-,root,root,-)
 diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
-index 78cc7fc..d674c36 100644
+index 378411086..b871e6525 100644
 --- a/contrib/CMakeLists.txt
 +++ b/contrib/CMakeLists.txt
-@@ -97,7 +97,7 @@ endif (INSTALL_BASH_COMPLETION)
- if (WITH_SYSTEMD)
+@@ -100,7 +100,7 @@ if (WITH_SYSTEMD)
+     configure_file( init/gammu-smsd.service init/gammu-smsd.service )
      install (
-         FILES init/gammu-smsd.service
+         FILES ${CMAKE_CURRENT_BINARY_DIR}/init/gammu-smsd.service
 -        DESTINATION "${SYSTEMD_SERVICES_INSTALL_DIR}"
 +        DESTINATION "${CMAKE_INSTALL_PREFIX}/systemd"
          COMPONENT "systemd"