diff --git a/subprojects/packagefiles/libjpegqs/include/libjpegqs.h b/subprojects/packagefiles/libjpegqs/include/libjpegqs.h
new file mode 100644
index 0000000..3705a25
--- /dev/null
+++ b/subprojects/packagefiles/libjpegqs/include/libjpegqs.h
@@ -0,0 +1,4 @@
+// This separate directory is necessary for Debian's multiarch with jpeg-turbo,
+// because its jpeglib.h cannot perform local inclusion of jconfig.h,
+// resulting in it being found within jpeg-quantsmooth and breaking the build.
+#include "../libjpegqs.h"
diff --git a/subprojects/packagefiles/libjpegqs/meson.build b/subprojects/packagefiles/libjpegqs/meson.build
index 9755f59..03c219b 100644
--- a/subprojects/packagefiles/libjpegqs/meson.build
+++ b/subprojects/packagefiles/libjpegqs/meson.build
@@ -13,29 +13,35 @@ if host_machine.cpu_family() == 'x86_64'
 	jpegqs_avx512 = static_library('jpegqs-avx512', 'libjpegqs.c',
 		c_args : ['-DSIMD_SELECT', '-DSIMD_NAME=avx512',
 			'-mavx512f', '-mfma', '-DSIMD_AVX512'],
-		dependencies : deps)
+		dependencies : deps,
+		implicit_include_directories : false)
 	jpegqs_avx2 = static_library('jpegqs-avx2', 'libjpegqs.c',
 		c_args : ['-DSIMD_SELECT', '-DSIMD_NAME=avx2',
 			'-mavx2', '-mfma', '-DSIMD_AVX2'],
-		dependencies : deps)
+		dependencies : deps,
+		implicit_include_directories : false)
 	jpegqs_sse2 = static_library('jpegqs-sse2', 'libjpegqs.c',
 		c_args : ['-DSIMD_SELECT', '-DSIMD_NAME=sse2', '-msse2', '-DSIMD_SSE2'],
-		dependencies : deps)
+		dependencies : deps,
+		implicit_include_directories : false)
 	jpegqs_base = static_library('jpegqs-base', 'libjpegqs.c',
 		c_args : ['-DSIMD_SELECT', '-DSIMD_NAME=base', '-DSIMD_BASE'],
-		dependencies : deps)
+		dependencies : deps,
+		implicit_include_directories : false)
 
 	jpegqs_lib = static_library('jpegqs', 'libjpegqs.c',
 		c_args : ['-DSIMD_SELECT'],
 		dependencies : deps,
-		link_with : [jpegqs_base, jpegqs_sse2, jpegqs_avx2, jpegqs_avx512])
+		link_with : [jpegqs_base, jpegqs_sse2, jpegqs_avx2, jpegqs_avx512],
+		implicit_include_directories : false)
 else
 	jpegqs_lib = static_library('jpegqs', 'libjpegqs.c',
 		c_args : ['-DNO_SIMD'],
-		dependencies : deps)
+		dependencies : deps,
+		implicit_include_directories : false)
 endif
 
 jpegqs_dep = declare_dependency(
 	link_with : jpegqs_lib,
-	include_directories : include_directories('.'),
+	include_directories : include_directories('include'),
 )