It finally compiles

codecs/mozjpeg/Makefile

@@ -20,5 +20,6 @@ $(filter dec/%,$(OUT_JS)): dec/mozjpeg_dec.cpp
 		-s ENVIRONMENT=$(ENVIRONMENT) \
 		-s EXPORT_ES6=1 \
 		-o $@ \
-		-ljpeg \
+		${MOZJPEG}/lib/libjpeg.a \
+		${MOZJPEG}/lib/rdswitch.o \
 		$+

codecs/mozjpeg/enc/mozjpeg_enc.cpp

@@ -5,7 +5,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include "config.h"
+#include "jconfig.h"
 #include "jpeglib.h"
 
 extern "C" {

codecs/mozjpeg/enc/mozjpeg_enc.d.ts

@@ -1,37 +0,0 @@
-export const enum MozJpegColorSpace {
-  GRAYSCALE = 1,
-  RGB,
-  YCbCr,
-}
-
-export interface EncodeOptions {
-  quality: number;
-  baseline: boolean;
-  arithmetic: boolean;
-  progressive: boolean;
-  optimize_coding: boolean;
-  smoothing: number;
-  color_space: MozJpegColorSpace;
-  quant_table: number;
-  trellis_multipass: boolean;
-  trellis_opt_zero: boolean;
-  trellis_opt_table: boolean;
-  trellis_loops: number;
-  auto_subsample: boolean;
-  chroma_subsample: number;
-  separate_chroma_quality: boolean;
-  chroma_quality: number;
-}
-
-export interface MozJPEGModule extends EmscriptenWasm.Module {
-  encode(
-    data: BufferSource,
-    width: number,
-    height: number,
-    options: EncodeOptions,
-  ): Uint8Array;
-}
-
-declare var moduleFactory: EmscriptenWasm.ModuleFactory<MozJPEGModule>;
-
-export default moduleFactory;

codecs/mozjpeg/flake.nix

@@ -33,7 +33,7 @@
         '';
         installPhase = ''
           mkdir -p $out
-          # cp 
+          cp enc/*.{wasm,js} $out
         '';
       };
       mozjpeg = stdenv.mkDerivation {
@@ -62,10 +62,12 @@
         '';
         buildPhase = ''
         	export HOME=$TMPDIR
-        	emmake make V=1 -j$(nproc) --trace libjpeg.la
+        	emmake make V=1 -j$(nproc) --trace 
         '';
         installPhase = ''
-          make install-includeHEADERS install-libLTLIBRARIES
+          make install
+          cp *.h $out/include
+          cp rdswitch.o $out/lib
         '';
         dontFixup = true;