libdeltachat: don't build static lib

pkgs/development/libraries/libdeltachat/default.nix

@@ -31,6 +31,7 @@ stdenv.mkDerivation rec {
       url = "https://github.com/deltachat/deltachat-core-rust/commit/408467e85d04fbbfd6bed5908d84d9e995943487.patch";
       sha256 = "1j2ywaazglgl6370js34acrg0wrh0b7krqg05dfjf65n527lzn59";
     })
+    ./no-static-lib.patch
   ];
 
   cargoDeps = rustPlatform.fetchCargoTarball {

pkgs/development/libraries/libdeltachat/no-static-lib.patch

@@ -0,0 +1,39 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index fe7abe08..acdbe0d6 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -13,7 +13,6 @@ find_program(CARGO cargo)
+ 
+ add_custom_command(
+ 	OUTPUT
+-	"target/release/libdeltachat.a"
+ 	"target/release/libdeltachat.${DYNAMIC_EXT}"
+ 	"target/release/pkgconfig/deltachat.pc"
+         COMMAND
+@@ -38,13 +37,11 @@ add_custom_target(
+ 	lib_deltachat
+ 	ALL
+ 	DEPENDS
+-	"target/release/libdeltachat.a"
+ 	"target/release/libdeltachat.${DYNAMIC_EXT}"
+ 	"target/release/pkgconfig/deltachat.pc"
+ )
+ 
+ include(GNUInstallDirs)
+ install(FILES "deltachat-ffi/deltachat.h" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+-install(FILES "target/release/libdeltachat.a" DESTINATION ${CMAKE_INSTALL_LIBDIR})
+ install(FILES "target/release/libdeltachat.${DYNAMIC_EXT}" DESTINATION ${CMAKE_INSTALL_LIBDIR})
+ install(FILES "target/release/pkgconfig/deltachat.pc" DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+diff --git a/deltachat-ffi/Cargo.toml b/deltachat-ffi/Cargo.toml
+index a34a27ba..cf354abb 100644
+--- a/deltachat-ffi/Cargo.toml
++++ b/deltachat-ffi/Cargo.toml
+@@ -12,7 +12,7 @@ categories = ["cryptography", "std", "email"]
+ 
+ [lib]
+ name = "deltachat"
+-crate-type = ["cdylib", "staticlib"]
++crate-type = ["cdylib"]
+ 
+ [dependencies]
+ deltachat = { path = "../", default-features = false }